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Tyler Grassman

  • Assistant Professor, Materials Science Engineering
  • Watts Hall
    Room 488
    Columbus, OH 43210
  • 614-688-1704

About

Dr. Tyler J. Grassman is an Assistant Professor in the Department of Materials Science and Engineering at The Ohio State University, with a joint appointment in the Department of Electrical and Computer Engineering. He received his B.S degree in Chemistry from the University of Oregon, and his M.S. and Ph.D. degrees in Materials Science and Engineering from the University of California, San Diego in La Jolla, CA.  After holding a postdoctoral research position in the Electronic Materials and Devices Laboratory and the Institute for Materials Research at OSU, he joined the faculty of the OSU MSE and ECE departments in 2012.

Dr. Grassman’s research interests lie in the development, production, and characterization of novel materials and combinations of materials for electronic and photonic applications.  Of particular focus is the area of photovoltaics, as well as other clean energy technologies.  This work encompasses a wide range of research activities, including (but not necessarily limited to): functional materials epitaxy and epitaxy science; heteroepitaxy and dissimilar materials integration; metamorphic materials; materials characterization and analysis methods; microstructure and defect characterization and engineering; surface and interface science; application and development of electron microscopy techniques; first-principles (ab-initio) materials modeling; multi-scale integrated computational materials engineering; general application of heteroepitaxy and materials integration to electronics and optoelectronics technologies.

Honors

  • April, 2019

    Lumley Research Award.

  • IEEE Golden Reviewer.

Chapters

2011

  • 2011. "Chapter 14: III-V Solar Cells on Silicon." In III-V Compound Semiconductors: Integration with Silicon-Based Microelectronics, edited by T. Li, M. Mastro, A. Dadgar,

Journal Articles

2018

  • Galiano, K.; Deitz, J.I.; Carnevale, S.D.; Gleason, D.A. et al., 2018, "Spatial correlation of the Ec-0.57 eV trap state with edge dislocations in epitaxial n-type gallium nitride." Journal of Applied Physics 123, no. 22,
  • Chmielewski, D.J.; Lepkowski, D.L.; Boyer, J.T.; Grassman, T.J. et al., 2018, "Comparative Study of similar to 2.05 eV Lattice-Matched and Metamorphic (Al)GaInP Solar Cells Grown by MOCVD." IEEE JOURNAL OF PHOTOVOLTAICS 8, no. 6, 1601-1607 - 1601-1607.
  • Deitz, J.I.; Sarwar, A.T.M.G.; Carnevale, S.D.; Grassman, T.J. et al., 2018, "Nano-Cathodoluminescence Measurement of Asymmetric Carrier Trapping and Radiative Recombination in GaN and InGaN Quantum Disks." MICROSCOPY AND MICROANALYSIS 24, no. 2, 93-98 - 93-98.
  • Deitz, J.I.; Karki, S.; Marsillac, S.X.; Grassman, T.J. et al., 2018, "Bandgap profiling in CIGS solar cells via valence electron energy-loss spectroscopy." JOURNAL OF APPLIED PHYSICS 123, no. 11,
  • Dahiya, V.; Deitz, J.I.; Hollingshead, D.A.; Carlin, J.A. et al., 2018, "Investigation of digital alloyed AlInSb metamorphic buffers." JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B 36, no. 2,

2017

  • Jackson, C.M.; Arehart, A.R.; Grassman, T.J.; McSkimming, B. et al., 2017, "Impact of Surface Treatment on Interface States of ALD Al2O3/GaN Interfaces." ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY 6, no. 8, P489-P494 - P489-P494.
  • Demuth, J.; Fahrenkrug, E.; Ma, L.; Shodiya, T. et al., 2017, "Electrochemical Liquid Phase Epitaxy (ec-LPE): A New Methodology for the Synthesis of Crystalline Group IV Semiconductor Epifilms." JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 139, no. 20, 6960-6968 - 6960-6968.

2016

  • Grassman,Tyler,J; Chmielewski,Daniel,J; Carnevale,Santino,D; Carlin,John,A; Ringel,Steven,A, 2016, "GaAs_0.75P_0.25/Si Dual-Junction Solar Cells Grown by MBE and MOCVD." IEEE JOURNAL OF PHOTOVOLTAICS 6, no. 1, 326-331 - 326-331.
  • Grassman, T.J.; Chmielewski, D.J.; Carnevale, S.D.; Carlin, J.A. et al., 2016, "GaAs0.75 P-0.25/Si Dual-Junction Solar Cells Grown by MBE and MOCVD." IEEE JOURNAL OF PHOTOVOLTAICS 6, no. 1, 326-331 - 326-331.
  • France, R.M.; Dimroth, F.; Grassman, T.J.; King, R.R., 2016, "Metamorphic epitaxy for multijunction solar cells." MRS BULLETIN 41, no. 3, 202-209 - 202-209.

2015

  • Paul, P.K.; Cardwell, D.W.; Jackson, C.M.; Galiano, K. et al., 2015, "Direct nm-Scale Spatial Mapping of Traps in CIGS." IEEE JOURNAL OF PHOTOVOLTAICS 5, no. 5, 1482-1486 - 1482-1486.
  • Almansouri, I.; Bremner, S.; Ho-Baillie, A.; Mehrvarz, H. et al., 2015, "Designing Bottom Silicon Solar Cells for Multijunction Devices." IEEE JOURNAL OF PHOTOVOLTAICS 5, no. 2, 683-690 - 683-690.
  • Sarwar,ATM Golam; May,Brelon,J; Deitz,Julia,I; Grassman,Tyler,J; McComb,David,W; Myers,Roberto,C, 2015, "Tunnel junction enhanced nanowire ultraviolet light emitting diodes." APPLIED PHYSICS LETTERS 107, no. 10, 101103 - 101103.
  • Deitz, J.I.; Carnevale, S.D.; Ringel, S.A.; McComb, D.W. et al., 2015, "Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization." JOVE-JOURNAL OF VISUALIZED EXPERIMENTS no. 101,
  • Carnevale,Santino,D; Deitz,Julia,I; Carlin,John,A; Picard,Yoosuf,N; McComb,David,W; De Graef,Marc; Ringel,Steven,A; Grassman,Tyler,J, 2015, "Applications of Electron Channeling Contrast Imaging for the Rapid Characterization of Extended Defects in III-V/Si Heterostructures." IEEE JOURNAL OF PHOTOVOLTAICS 5, no. 2, 676-682 - 676-682.
  • Deitz,Julia,I; Carnevale,Santino,D; Ringel,Steven,A; McComb,David,W; Grassman,Tyler,J, 2015, "Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization." JOURNAL OF VISUALIZED EXPERIMENTS no. 101, e52745 - e52745.
  • Paul,P,K; Cardwell,D,W; Jackson,C,M; Galiano,K; Aryal,K; Pelz,J,P; Marsillac,S; Ringel,S,A; Grassman,T,J; Arehart,A,R, 2015, "Direct nm-Scale Spatial Mapping of Traps in CIGS." IEEE JOURNAL OF PHOTOVOLTAICS 5, no. 5, 1482-1486 - 1482-1486.
  • Almansouri,Ibraheem; Bremner,Stephen; Ho-Baillie,Anita; Mehrvarz,Hamid; Hao,Xiaojing; Conibeer,Gavin; Grassman,Tyler,J; Carlin,John,A; Haas,Alexander; Ringel,Steven,A; Green,Martin,A, 2015, "Designing Bottom Silicon Solar Cells for Multijunction Devices." IEEE JOURNAL OF PHOTOVOLTAICS 5, no. 2, 683-690 - 683-690.
  • I. A. Mansouri, S. Bremner, A. Ho-Baillie, H. Mehrvarz, X. Hao, G. Conibeer, T. J. Grassman, J. A. Carlin, A. Haas, S. A. Ringel and M. A. Green, 2015, Designing Bottom Silicon Solar Cells for Multijunction Devices. IEEE Journal of Photovoltaics 5, no. 2, 683-690 - 683-690.

2014

  • Grassman, T. J., Carlin, J. A., Galiana, B., Yang, F., Mills, M. J., Ringel, S. A., 2014, MOCVD-Grown GaP/Si Subcells for Integrated III-V/Si Multijunction Photovoltaics. IEEE Journal of Photovoltaics 4, no. 3, 972-980 - 972-980.
  • Carnevale, S.D.; Deitz, J.I.; Carlin, J.A.; Picard, Y.N. et al., 2014, "Rapid misfit dislocation characterization in heteroepitaxial III-V/Si thin films by electron channeling contrast imaging." APPLIED PHYSICS LETTERS 104, no. 23,
  • Carnevale,Santino,D; Deitz,Julia,I; Carlin,John,A; Picard,Yoosuf,N; De Graef,Marc; Ringel,Steven,A; Grassman,Tyler,J, 2014, Rapid misfit dislocation characterization in heteroepitaxial III-V/Si thin films by electron channeling contrast imaging. APPLIED PHYSICS LETTERS 104, no. 23, 232111 - 232111.
  • Chmielewski,Daniel,J; Grassman,Tyler,J; Carlin,Andrew,M; Carlin,John,A; Speelman,Austin,J; Ringel,Steven,A, 2014, "Metamorphic GaAsP Tunnel Junctions for High-Efficiency III-V/IV Multijunction Solar Cell Technology." IEEE JOURNAL OF PHOTOVOLTAICS 4, no. 5, 1301-1305 - 1301-1305.
  • Grassman, T.J.; Carlin, J.A.; Galiana, B.; Yang, F. et al., 2014, "MOCVD-Grown GaP/Si Subcells for Integrated III-V/Si Multijunction Photovoltaics." IEEE JOURNAL OF PHOTOVOLTAICS 4, no. 3, 972-980 - 972-980.

2013

  • Grassman, T.J.; Carlin, J.A.; Galiana, B.; Yang, L-M. et al., 2013, "Nucleation-related defect-free GaP/Si(100) heteroepitaxy via metal-organic chemical vapor deposition." APPLIED PHYSICS LETTERS 102, no. 14,
  • Grassman, T. J. Carlin, J. A. Galiana, B. Yang, L. M. Yang, F. Mills, M. J. Ringel, S. A., 2013, "Nucleation-related defect-free GaP/Si(100) heteroepitaxy via metal-organic chemical vapor deposition." Applied Physics Letters 102, no. 14, 142102 - 142102.

2011

  • Swaminathan, K.; Yang, L-M.; Grassman, T.J.; Tabares, G. et al., 2011, "Metamorphic In0.20Ga0.80As p-i-n photodetectors grown on GaAs substrates for near infrared applications." OPTICS EXPRESS 19, no. 8, 7280-7288 - 7280-7288.
  • Swaminathan, K.; Grassman, T.J.; Yang, L-M.; Gu, Q. et al., 2011, "Optically-aligned visible/near-infrared dual-band photodetector materials and devices on GaAs using metamorphic epitaxy." JOURNAL OF APPLIED PHYSICS 110, no. 6,
  • Swaminathan,K; Grassman,T,J; Yang,L-M; Gu,Q; Mills,M,J; Ringel,S,A, 2011, "Optically-aligned visible/near-infrared dual-band photodetector materials and devices on GaAs using metamorphic epitaxy." JOURNAL OF APPLIED PHYSICS 110, no. 6, 063109 - 063109.
  • RATCLIFF,C; Grassman,T,J; Carlin,J,A; Ringel,S,A, 2011, "High temperature step-flow growth of gallium phosphide by molecular beam epitaxy and metalorganic chemical vapor deposition." APPLIED PHYSICS LETTERS 99, no. 14, 141905 - 141905.
  • Swaminathan,K; Yang,L-M; Grassman,T,J; Tabares,G; Guzman,A; Hierro,A; Mills,M,J; Ringel,S,A, 2011, "Metamorphic In0.20Ga0.80As p-i-n photodetectors grown on GaAs substrates for near infrared applications." OPTICS EXPRESS 19, no. 8, 7280-7288 - 7280-7288.

2010

  • Lee, J.S.; Bishop, S.R.; Grassman, T.J.; Kummel, A.C., 2010, "Plasma nitridation of Ge(100) surface studied by scanning tunneling microscopy." SURFACE SCIENCE 604, no. 15-16, 1239-1246 - 1239-1246.
  • Grassman, T.J.; Brenner, M.R.; Gonzalez, M.; Carlin, A.M. et al., 2010, "Characterization of Metamorphic GaAsP/Si Materials and Devices for Photovoltaic Applications." IEEE TRANSACTIONS ON ELECTRON DEVICES 57, no. 12, 3361-3369 - 3361-3369.

2009

  • Grassman, T.J.; Bishop, S.R.; Kummel, A.C., 2009, "Density functional theory study of first-layer adsorption of ZrO2 and HfO2 on Ge(100)." MICROELECTRONIC ENGINEERING 86, no. 3, 249-258 - 249-258.
  • Tran, N.L.; Bishop, S.R.; Grassman, T.J.; Poon, G.C. et al., 2009, "NO chemisorption dynamics on thick FePc and ttbu-FePc films." JOURNAL OF CHEMICAL PHYSICS 130, no. 17,
  • Grassman,T,J; Bishop,S,R; Kummel,A,C, 2009, "Density functional theory study of first-layer adsorption of ZrO2 and HfO2 on Ge(100)." MICROELECTRONIC ENGINEERING 86, no. 3, 249-258 - 249-258.
  • Feldwinn, D.L.; Clemens, J.B.; Shen, J.; Bishop, S.R. et al., 2009, "Anomalous hybridization in the In-rich InAs(001) reconstruction." SURFACE SCIENCE 603, no. 22, 3321-3328 - 3321-3328.
  • Grassman, T.J.; Brenner, M.R.; Rajagopalan, S.; Unocic, R. et al., 2009, "Control and elimination of nucleation-related defects in GaP/Si(001) heteroepitaxy." APPLIED PHYSICS LETTERS 94, no. 23,

2008

  • Grassman, T.J.; Bishop, S.R.; Kummel, A.C., 2008, "An atomic view of Fermi level pinning of Ge(100) by O-2." SURFACE SCIENCE 602, no. 14, 2373-2381 - 2373-2381.

2007

  • Winn, D.L.; Hale, M.J.; Grassman, T.J.; Kummel, A.C. et al., 2007, "Direct and indirect causes of Fermi level pinning at the SiO/GaAs interface." JOURNAL OF CHEMICAL PHYSICS 126, no. 8,
  • Winn, D.L.; Hale, M.J.; Grassman, T.J.; Sexton, J.Z. et al., 2007, "Electronic properties of adsorbates on GaAs(001)-c(2x8)/(2x4)." JOURNAL OF CHEMICAL PHYSICS 127, no. 13,

2005

  • Hale, M.J.; Winn, D.L.; Grassman, T.J.; Kummel, A.C. et al., 2005, "Chemically resolved scanning tunneling microscopy imaging of Al on p-type Al0.1Ga0.9As(001)-c(2x8)/(2x4)." JOURNAL OF CHEMICAL PHYSICS 122, no. 12,

2004

  • Grassman, T.J.; Poon, G.C.; Kummel, A.C., 2004, "Low coverage spontaneous etching and hyperthermal desorption of aluminum chlorides from Cl-2/Al(111)." JOURNAL OF CHEMICAL PHYSICS 121, no. 18, 9018-9030 - 9018-9030.

2003

  • Poon, G.C.; Grassman, T.J.; Gumy, J.C.; Kummel, A.C., 2003, "Direct and precursor-mediated hyperthermal abstractive chemisorption of Cl-2/Al(111)." JOURNAL OF CHEMICAL PHYSICS 119, no. 18, 9818-9828 - 9818-9828.

2000

  • Grassman, T.J.; Knowles, M.K.; Marcus, A.H., 2000, "Structure and dynamics of fluorescently labeled complex fluids by Fourier imaging correlation spectroscopy." PHYSICAL REVIEW E 62, no. 6, 8245-8257 - 8245-8257.
  • Knowles, M.K.; Grassman, T.J.; Marcus, A.H., 2000, "Measurement of the dynamic structure function of fluorescently labeled complex fluids by Fourier imaging correlation spectroscopy." PHYSICAL REVIEW LETTERS 85, no. 13, 2837-2840 - 2837-2840.

Unknown

Presentations

  • "Atomic-scale Digital Alloying for III-Sb Metamorphic Buffers." 2018, Presented at Materials Science & Technology Meeting,
  • "Metamorphic Pathways toward Long-Wavelength InAsSb via MBE and MOCVD." 2018, Presented at 34th North American Conference on Molecular Beam Epitaxy,
  • "Correlative Defect Characterization in Semiconductors with Electron Channeling Contrast Imaging and Scanning Deep Level Transient Spectroscopy." 2018, Presented at Microscopy & Microanalysis Meeting,
  • "Continued Progress Toward High-Performance Monolithic GaAsP/Si Tandem Solar Cells." 2018, Presented at 7th IEEE World Conference on Photovoltaic Energy Conversion,
  • "Infrared Metamorphic III-V-Sb Materials Growth at OSU." 2018, Presented at OSU IMR Materials Week,
  • "Continued Progress Toward High-Performance Epitaxial III-V/Si Multijunction Solar Cells." 2018, Presented at Spring Materials Research Society Meeting,
  • "SEM is the New TEM: Recent Advances in Channeling Based Imaging in the SEM." 2017, Presented at OSU IMR Materials Week,
  • "Development of Epitaxial III-V/Si Multijunction Solar Cells." 2017, Presented at Spring Materials Research Society Meeting,
  • "Development of Epitaxial III-V/Si Multijunction Solar Cells." 2016, Presented at Guest Seminar,
  • "Cutting-Edge PV Research and the OSU Perspective." 2016, Presented at OSU Green Home Workshop,
  • "Advances in III-V/Si for Multijunction Solar Cells." 2015, Presented at Materials Science and Technology Meeting,
  • "Progress in the Development of Epitaxial III-V/Si Multijunction Solar Cells." 2015, Presented at Guest Seminar,
  • "Advances in the Development of Epitaxial GaAsP/Si Dual-Junction Solar Cells." 2015, Presented at 57th Electronic Materials Conference,
  • "Progress in the Development of Epitaxial GaAsP/Si Dual-Junction Solar Cells." 2015, Presented at 42nd IEEE Photovoltaic Specialists Conference,
  • "Advances in III-V/Active-Silicon Multijunction Photovoltaics: Progress Toward a Si-Plus Architecture." 2015, Presented at 227th Electrochemical Society Meeting,
  • "Heteroepitaxial Materials Integration and Defect Engineering for Advanced III-V/Si Photovoltaics." 2015, Presented at OSU IMR Materials Week,
  • "Advances in the Development of Epitaxial III-V/Si Multijunction Solar Cells." 2014, Presented at Guest Seminar,
  • "Rapid Extended Defect Characterization in Semiconductor Heterostructures by Electron Channeling Contrast Imaging." 2014, Presented at Space Photovoltaic Research and Technology Conference XXIII,
  • "Progress Toward a Si-Plus Architecture: Epitaxially-Integrable Si Sub-Cells for III-V/Si Multijunction Photovoltaics." 2014, Presented at 56th MRS Electronic Materials Conference,
  • "Progress Toward a Si-Plus Architecture: Epitaxially-Integrable Si Sub-Cells for III-V/Si Multijunction Photovoltaics." 2014, Presented at 40th IEEE Photovoltaic Specialists Conference,
  • "Epitaxially-Grown Metamorphic GaAsP/Si Dual-Junction Solar Cells." 2013, Presented at 39th IEEE Photovoltaic Specialists Conference,
  • "Exploration of Epitaxial Quantum Dots within Wide Band Gap Metamorphic Host Materials for Intermediate Band Solar Cells." 2013, Presented at 39th IEEE Photovoltaic Specialists Conference,
  • "Epitaxial Quantum Dots in the GaAsP/(Si) Metamorphic Materials System." 2012, Presented at Fall Materials Research Society Meeting,
  • "Heterovalent Integration and Metamorphic Materials Engineering for III-V/Si Photovoltaics and Optoelectronics." 2012, Presented at International Materials Research Congress XXI,
  • "Heterovalent Materials Integration and Metamorphic Substrate Engineering for Advanced III-V/Si Photovoltaics." 2011, Presented at Guest Seminar,
  • "Expanding the Palette: Metamorphic Strategies for Extending the Spectrum of Accessible Photovoltaic and Optoelectronic Materials." 2011, Presented at Guest Seminar,
  • "Development of Epitaxially-Integrated Semi-Transparent Metamorphic Buffers for III-V/Si Photovoltaics." 2011, Presented at Space Photovoltaic Research and Technology Conference XXII,
  • "Expanding the Palette: Metamorphic Strategies Over Multiple Lattice Constant Ranges for Extending the Spectrum of Accessible Photovoltaic Materials." 2011, Presented at 37th IEEE Photovoltaic Specialists Conference,
  • "III-V/Si Integration and Metamorphic Substrate Engineering for Advanced Photovoltaics." 2011, Presented at Guest Seminar,
  • "Metamorphic GaAsP and InGaP Photovoltaic Materials on Si for High-Efficiency III-V/Si Multijunction Solar Cells." 2010, Presented at 35th IEEE Photovoltaic Specialists Conference,
  • "Toward Metamorphic Multijunction GaAsP/Si Photovoltaics Grown on Optimized GaP/Si Virtual Substrates using Anion-Graded GaAsyP1-y Buffers." 2009, Presented at 36th IEEE International Symposium on Compound Semiconductors,
  • "Toward Metamorphic Multijunction GaAsP/Si Photovoltaics Grown on Optimized GaP/Si Virtual Substrates using Anion-Graded GaAsyP1-y Buffers." 2009, Presented at 34th IEEE Photovoltaic Specialists Conference,
  • "Toward Metamorphic Multijunction GaAsP/Si Photovoltaics Grown on Optimized GaP/Si Virtual Substrates using Anion-Graded GaAsyP1-y Buffers." 2009, Presented at 51st TMS/IEEE Electronic Materials Conference,
  • "Mitigation of Interface-Induced Defects in III-V/IV Heteroepitaxy: GaAs/Ge and GaP/Si." 2009, Presented at 36th Conference on the Physics and Chemistry of Surface and Interfaces,
  • "Metamorphic GaAsP ~1.7 eV Solar Cell Materials and Structures Grown on Si Substrates using Anion-Graded GaAsyP1-y Buffers." 2008, Presented at Fall Materials Research Society Meeting,
  • "Nucleation of III-V Materials on IV(001) Substrates for Defect-Free Solid Source MBE Heteroepitaxy: GaP/Si vs. GaAs/Ge." 2008, Presented at 50th TMS/IEEE Electronic Materials Conference,
  • "Atomic-Level Analysis of Pinning and Passivation on the Ge(100) Surface: Comparison of O and N." 2007, Presented at 34th Conference on the Physics and Chemistry of Semiconductor Interfaces,
  • "Atomic-Level Analysis of Passivation and High-k Interfaces on Ge(100) for Ge-based MOSFET Devices." 2006, Presented at 37th IEEE Semiconductor Interface Specialists Conference,
  • "Theoretical Analysis of the Interface Between Zr(Hf)O2 and Ge(100) for Ge-based MOSFET Devices." 2006, Presented at AVS 53rd Annual International Symposium,
  • "Microscopic Studies of the SiO/Ge(100) Interface: A Surface Passivation Method for Gate Dielectric Growth." 2006, Presented at European Materials Research Society Spring Meeting,
  • "Theoretical Analysis of the Interface Between Zr(Hf)O2 and Ge(100) for Ge-based MOSFET Devices." 2005, Presented at 52nd AVS Annual International Symposium,
  • "STM, STS, and DFT Studies of the SiO/Ge(100) Interface: A Surface Passivation Method for Gate Dielectric Growth." 2006, Presented at 33rd Conference on the Physics and Chemistry of Semiconductor Interfaces,
  • "STM, STS, and DFT Studies of the SiO/Ge(100) Interface: A Surface Passivation Method for Gate Dielectric Growth." 2005, Presented at 52nd AVS Annual International Symposium,
  • "STM, STS, and DFT Studies of the SiO/Ge(100) Interface: A Surface Passivation Method for Gate Dielectric Growth." 2005, Presented at Semiconductor Research Corporation TECHCON,
  • "STM, STS, and DFT Studies of SiO Deposition on the Ge(001)-2×1 Surface." 2005, Presented at 32nd Conference on the Physics and Chemistry of Semiconductor Interfaces,
  • "STM, STS, and DFT Studies of SiO Deposition on the Ge(100) Surface." 2004, Presented at 51st AVS Annual International Symposium,
  • "Dynamics of Cl2 Adsorption on and AlCl3 Desorption from Al(111)." 2004, Presented at Donostia International Physics Center Workshop,
  • "STM, STS, and DFT Studies of SiO Deposition on the Ge(001)-p(2×1) Surface." 2004, Presented at 31st Conference on the Physics and Chemistry of Semiconductor Interfaces,
  • "Ultra-Low Coverage Spontaneous Etching and Hyperthermal Desorption of Aluminum Chlorides from Cl2/Al(111)." 2003, Presented at 50th AVS Annual International Symposium,
  • "Ultra-Low Coverage Spontaneous Etching and Hyperthermal Desorption of Aluminum Chlorides from Cl2/Al(111)." 2003, Presented at Gordon Research Conference on Dynamics at Surfaces,
  • "Investigation of AlSb(001)/Oxide Interfaces via Density Functional Theory." 2003, Presented at 30th Conference on the Physics and Chemistry of Semiconductor Interfaces,

Papers in Proceedings

2018

2017

  • Rajan, G.; Karki, S.; Butt, I.; Aryal, K. et al. "Understanding Instabilities and Degradation due to Moisture Ingress in Cu(In,Ga)Se-2 Solar Cells." in IEEE 44th Photovoltaic Specialist Conference (PVSC). (1 2017).
  • Boyer, J.T.; Lepkowski, D.L.; Chmielewski, D.J.; Ringel, S.A. et al. "Graded (AlzGa1-z)(x)In1-xP Window-Emitter Structures for Improved Short-Wavelength Response." (1 2017).
  • Rajan, G.; Karki, S.; Butt, I.; Aryal, K. et al. "Understanding Instabilities and Degradation due to Moisture Ingress in Cu(In,Ga)Se-2 Solar Cells." (1 2017).
  • Silvaggio, A.C.; Lepkowski, D.L.; Chmielewski, D.J.; Boyer, J.T. et al. "Optimization of a GaAsP Top Cell for Implementation in a III-V/Si Tandem Structure." (1 2017).
  • Deitz, J.I.; Paul, P.K.; Karki, S.; Marsillac, S. et al. "Detecting Sub Bandgap Energies in CIGS with Electron Energy-Loss Spectroscopy." (7 2017).

2016

  • E. Garcia-Tabares, T. J. Grassman, D. Martin, J. Carlin, I. Rey-Stolle and S. A. Ringel Evolution of the silicon bottom cell photovoltaic behavior during III-V on Si multi-junction solar cells production. in 42nd IEEE Photovoltaic Specialist Conference. http://dx.doi.org/10.1109/pvsc.2015.7356380, (1 2016).
  • P. K. Paul, D. W. Cardwell, C. M. Jackson, K. Galiano, K. Aryal, J. P. Pelz, S. Marsillac, S. A. Ringel, T. J. Grassman and A. R. Arehart Direct nm-scale spatial mapping of traps in CIGS. in 42nd IEEE Photovoltaic Specialist Conference. http://dx.doi.org/10.1109/pvsc.2015.7355656, (1 2016).
  • Deitz, J.I.; McComb, D.W.; Grassman, T.J. "Advancement of Heteroepitaxial III-V/Si Thin Films through Defect Characterization." (7 2016).
  • Deitz, J.I.; Grassman, T.J.; McComb, D.W. "Accessing High Spatial Resolution Low-Loss EELS Information without Cerenkov Radiation." (7 2016).
  • Chmielewski, D.J.; Galiano, K.; Paul, P.; Cardwell, D. et al. "Comparative Study of 2.05 eV AlGaInP and Metamorphic GaInP Materials and Solar Cells Grown by MBE and MOCVD." in 43rd IEEE Photovoltaic Specialists Conference (PVSC). (1 2016).
  • Grassman, T.J.; Chmielewski, D.J.; Carlin, J.A.; Ringel, S.A. "Development of Epitaxial 2-and 3-Junction III-V/Si Solar Cells." in 43rd IEEE Photovoltaic Specialists Conference (PVSC). (1 2016).
  • Grassman, T.J.; Chmielewski, D.J.; Carlin, J.A.; Ringel, S.A. Development of epitaxial 2- and 3-junction III-V/Si solar cells. in 43rd IEEE Photovoltaic Specialists Conference. https://dx.doi.org/10.1109/pvsc.2016.7749986, (11 2016).
  • Paul, P.K.; Aryal, K.; Marsillac, S.; Grassman, T.J. et al. "Identifying the source of reduced performance in 1-stage-grown Cu(In,Ga)Se-2 solar cells." in 43rd IEEE Photovoltaic Specialists Conference (PVSC). (1 2016).
  • Grassman, T.J.; Carlin, J.A.; Carnevale, S.D.; Al Mansouri, I. et al. Progress toward a Si-plus architecture: Epitaxially-integrable Si sub-cells for III-V/Si multijunction photovoltaics. in 40th IEEE Photovoltaic Specialists Conference. https://dx.doi.org/10.1109/PVSC-Vol2.2014.7588253, (10 2016).

2015

  • Chmielewski, D.J.; Carnevale, S.; Grassman, T.J.; Carlin, J.A. et al. "High-performance metamorphic tunnel junctions for III-V/Si multijunction solar cells." (12 2015).
  • Chmielewski, D.J.; Carnevale, S.; Grassman, T.J.; Carlin, J.A. et al. "High-Performance Metamorphic Tunnel Junctions for III-V/Si Multijunction Solar Cells." in IEEE 42nd Photovoltaic Specialist Conference (PVSC). (1 2015).
  • Grassman, T.J.; Chmielewski, D.J.; Carnevale, S.D.; Carlin, J.A. et al. "GaAsP/Si Dual-Junction Solar Cells Grown by MBE and MOCVD." in IEEE 42nd Photovoltaic Specialist Conference (PVSC). (1 2015).
  • Cardwell, D.W.; Vaughn, N.; Paul, P.; Ratcliff, C. et al. "Investigations of Metamorphic (Al)GaInP for III-V Multijunction Photovoltaics." in IEEE 42nd Photovoltaic Specialist Conference (PVSC). (1 2015).
  • Garcia-Tabares, E.; Grassman, T.J.; Martin, D.; Carlin, J. et al. "Evolution of the silicon bottom cell photovoltaic behavior during III-V on Si multi-junction solar cells production." (12 2015).
  • Cardwell, D.W.; Vaughn, N.; Paul, P.; Ratcliff, C. et al. "Investigations of metamorphic (Al)GaInP for III-V multijunction photovoltaics." (12 2015).
  • Grassman, T.J.; Chmielewski, D.J.; Carnevale, S.D.; Carlin, J.A. et al. "GaAsP/Si dual-junction solar cells grown by MBE and MOCVD." (12 2015).
  • Paul, P.K.; Cardwell, D.W.; Jackson, C.M.; Galiano, K. et al. "Direct nm-scale spatial mapping of traps in CIGS." (1 2015).
  • Paul, P.K.; Cardwell, D.W.; Jackson, C.M.; Galiano, K. et al. "Direct nm-scale spatial mapping of traps in CIGS." (12 2015).
  • Garcia-Tabares, E.; Grassman, T.J.; Martin, D.; Carlin, J. et al. "Evolution of the Silicon Bottom Cell Photovoltaic Behavior during III-V on Si Multi-junction Solar Cells Production." (1 2015).
  • Cardwell, D.W.; Vaughn, N.; Paul, P.; Ratcliff, C. et al. "Investigations of Metamorphic (Al)GaInP for III-V Multijunction Photovoltaics." (1 2015).
  • Grassman, T.J.; Chmielewski, D.J.; Carnevale, S.D.; Carlin, J.A. et al. "GaAsP/Si Dual-Junction Solar Cells Grown by MBE and MOCVD." (1 2015).
  • Garcia-Tabares, E.; Grassman, T.J.; Martin, D.; Carlin, J. et al. "Evolution of the Silicon Bottom Cell Photovoltaic Behavior during III-V on Si Multi-junction Solar Cells Production." in IEEE 42nd Photovoltaic Specialist Conference (PVSC). (1 2015).
  • Chmielewski, D.J.; Carnevale, S.; Grassman, T.J.; Carlin, J.A. et al. "High-Performance Metamorphic Tunnel Junctions for III-V/Si Multijunction Solar Cells." (1 2015).
  • Grassman,Tyler,J; Chmielewski,Daniel,J; Carnevale,Santino,D; Carlin,John,A; Ringel,Steven,A GaAsP/Si Dual-Junction Solar Cells Grown by MBE and MOCVD. in IEEE Photovoltaic Specialist Conference (PVSC). http://dx.doi.org/10.1109/pvsc.2015.7356384, (1 2015).
  • Paul, P.K.; Cardwell, D.W.; Jackson, C.M.; Galiano, K. et al. "Direct nm-scale spatial mapping of traps in CIGS." in IEEE 42nd Photovoltaic Specialist Conference (PVSC). (1 2015).
  • Cardwell,Drew,W; Vaughn,Nathan; Paul,Pran; Ratcliff,Chris; Chmielewski,Dan; Carnevale,Santino; Arehart,Aaron; Grassman,Tyler,J; Ringel,Steven,A Investigations of Metamorphic (Al)GaInP for III-V Multijunction Photovoltaics. in IEEE 42nd Photovoltaic Specialist Conference (PVSC). http://dx.doi.org/10.1109/pvsc.2015.7356437, (1 2015).
  • Chmielewski,Daniel,J; Carnevale,Santino; Grassman,Tyler,J; Carlin,John,A; Ringel,Steven,A High-Performance Metamorphic Tunnel Junctions for III-V/Si Multijunction Solar Cells. in IEEE 42nd Photovoltaic Specialist Conference (PVSC). http://dx.doi.org/10.1109/pvsc.2015.7356382, (1 2015).

2014

  • C. Ratcliff, T. J. Grassman, J. A. Carlin, D. J. Chmielewski, S. A. Ringel "Ga-rich GaxIn1-xP solar cells on Si with 1.95 eV bandgap for ideal III-V/Si photovoltaics." in Proceedings of the SPIE 8981. (3 2014).
  • Carnevale, S.D.; Deitz, J.I.; Carlin, J.A.; Picard, Y.N. et al. "Rapid Characterization of Extended Defects in III-V/Si by Electron Channeling Contrast Imaging." in 40th IEEE Photovoltaic Specialists Conference (PVSC). (1 2014).
  • Chmielewski, D.J.; Grassman, T.J.; Carlin, A.M.; Carlin, J.A. et al. "Metamorphic GaAsP Tunnel Junctions for High-Efficiency III-V/IV Multijunction Solar Cell Technology." (9 2014).
  • Carnevale,Santino,D; Deitz,Julia,I; Carlin,John,A; Picard,Yoosuf,N; De Graef,Marc; Ringel,Steven,A; Grassman,Tyler,J Rapid Characterization of Extended Defects in III-V/Si by Electron Channeling Contrast Imaging. in IEEE Photovoltaic Specialists Conference (PVSC). http://dx.doi.org/10.1109/pvsc.2014.6925512, (1 2014).
  • Ratcliff, C.; Grassman, T.J.; Carlin, J.A.; Chmielewski, D.J. et al. "Ga-rich GaxIn1-xP solar cells on Si with 1.95 eV bandgap for ideal III-V/Si photovoltaics." (1 2014).
  • Ratcliff, C.; Grassman, T.J.; Carlin, J.A.; Chmielewski, D.J. et al. "Ga-rich GaxIn1-xP solar cells on Si with 1.95 eV bandgap for ideal III-V/Si photovoltaics." in Conference on Physics, Simulation, and Photonic Engineering of Photovoltaic Devices III. (1 2014).
  • S. D. Carnevale, J. I. Deitz, J. A. Carlin, Y. N. Picard, M. De Graef, S. A. Ringel and T. J. Grassman Rapid characterization of extended defects in III-V/Si by electron channeling contrast imaging. in 40th IEEE Photovoltaic Specialist Conference. http://dx.doi.org/10.1109/pvsc.2014.6925512, (6 2014).
  • Ratcliff, C.; Grassman, T.J.; Carlin, J.A.; Chmielewski, D.J. et al. "Ga-rich GaxIn1-xP solar cells on Si with 1.95 eV bandgap for ideal III-V/Si photovoltaics." (1 2014).
  • Carnevale, S.D.; Deitz, J.I.; Carlin, J.A.; Picard, Y.N. et al. "Rapid Characterization of Extended Defects in III-V/Si by Electron Channeling Contrast Imaging." (1 2014).
  • Chmielewski, D.J.; Grassman, T.J.; Carlin, A.M.; Carlin, J.A. et al. "Metamorphic GaAsP Tunnel Junctions for High-Efficiency III-V/IV Multijunction Solar Cell Technology." (9 2014).
  • Carnevale, S.D.; Deitz, J.I.; Carlin, J.A.; Picard, Y.N. et al. "Rapid characterization of extended defects in III-V/Si by electron channeling contrast imaging." (1 2014).
  • Chmielewski, D.J.; Grassman, T.J.; Carlin, A.M.; Carlin, J.A. et al. "Metamorphic GaAsP tunnel junctions for high-efficiency III-V/IV multijunction solar cell technology." (1 2014).

2013

  • Chmielewski, D.J.; Grassman, T.J.; Carlin, A.M.; Carlin, J. et al. "Metamorphic Tunnel Junctions for High Efficiency III-V/IV Multi-Junction Solar Cell Technology." (1 2013).
  • Grassman, T.J.; Carlin, J.A.; Ratcliff, C.; Chmielewski, D.J. et al. "Epitaxially-grown metamorphic GaAsP/Si dual-junction solar cells." (1 2013).
  • Haas, A.; Sharps, P.; Aiken, D.; Grassman, T. et al. "Analysis of short- and long-term performance goals for III/V on active Si concentrator solar cells." (1 2013).
  • Grassman, T.J.; Shah, D.B.; Carlin, J.A.; Ringel, S.A. et al. "Exploration of Epitaxial Quantum Dots within Wide Band Gap Metamorphic Host Materials for Intermediate Band Solar Cells." (1 2013).
  • Haas, A.; Sharps, P.; Aiken, D.; Grassman, T. et al. "Analysis of Short- and Long-Term Performance Goals for III/V on Active Si Concentrator Solar Cells." in 39th IEEE Photovoltaic Specialists Conference (PVSC). (1 2013).
  • Haas, A.; Sharps, P.; Aiken, D.; Grassman, T. et al. "Analysis of Short- and Long-Term Performance Goals for III/V on Active Si Concentrator Solar Cells." (1 2013).
  • Chmielewski, D.J.; Grassman, T.J.; Carlin, A.M.; Carlin, J. et al. "Metamorphic tunnel junctions for high efficiency III-V/IV multi-junction solar cell technology." (1 2013).
  • Grassman, T.J.; Shah, D.B.; Carlin, J.A.; Ringel, S.A. "Exploration of epitaxial quantum dots within wide band gap metamorphic host materials for intermediate band solar cells." (1 2013).
  • Mansouri, I.A.; Bremner, S.; Ho-Baillie, A.; Mehrvarz, H. et al. "Design of bottom silicon solar cell for multijunction devices." (1 2013).
  • Grassman, T.J.; Carlin, J.A.; Ratcliff, C.; Chmielewski, D.J. et al. "Epitaxially-Grown Metamorphic GaAsP/Si Dual-Junction Solar Cells." (1 2013).
  • Al Mansouri, I.; Bremner, S.; Ho-Baillie, A.; Mehrvarz, H. et al. "Design of Bottom Silicon Solar Cell for Multijunction Devices." (1 2013).
  • Ringel, S.A.; Carlin, J.A.; Grassman, T.J.; Galiana, B. et al. "Ideal GaP/Si heterostructures grown by MOCVD: III-V/active-Si subcells, multijuntions, and MBE-to-MOCVD III-V/Si interface science." (1 2013).
  • Tyler J. Grassman, John A. Carlin, Chris Ratcliff, Daniel J. Chmielewski, Steven A. Ringel "Epitaxially-Grown Metamorphic GaAsP/Si Dual-Junction Solar Cells." in 39th IEEE Photovoltaic Specialists Conference. (6 2013).
  • Ringel, S.A.; Carlin, J.A.; Grassman, T.J.; Galiana, B. et al. "Ideal GaP/Si Heterostructures Grown by MOCVD: III-V/Active-Si Subcells, Multijuntions, and MBE-to-MOCVD III-V/Si Interface Science." (1 2013).
  • Ringel, S.A.; Carlin, J.A.; Grassman, T.J.; Galiana, B. et al. "Ideal GaP/Si Heterostructures Grown by MOCVD: III-V/Active-Si Subcells, Multijuntions, and MBE-to-MOCVD III-V/Si Interface Science." in 39th IEEE Photovoltaic Specialists Conference (PVSC). (1 2013).
  • Al Mansouri,Ibraheem; Bremner,Stephen; Ho-Baillie,Anita; Mehrvarz,Hamid; Hao,Xiaojing; Conibeer,Gavin; Green,Martin,A; Grassman,Tyler,J; Carlin,John,A; Ringel,Steven,A Design of Bottom Silicon Solar Cell for Multijunction Devices. in IEEE Photovoltaic Specialists Conference (PVSC). http://dx.doi.org/10.1109/pvsc.2013.6745159, (1 2013).
  • Haas,Alexander; Sharps,Paul; Aiken,Daniel; Grassman,Tyler; Carlin,John,A; Ringel,Steven Analysis of Short- and Long-Term Performance Goals for III/V on Active Si Concentrator Solar Cells. in 39th IEEE Photovoltaic Specialists Conference (PVSC). http://dx.doi.org/10.1109/PVSC.2013.6744282, (1 2013).
  • M.A. Green, X. Hao, S. Bremner, G. J. Conibeer, I. Al Mansouri, N. Song, Z. Liu, S. A. Ringel, J. A. Carlin, T. J. Grassman, B. Galiana, A. M. Carlin, C. Ratcliff, D. Chmielewski, L. Yang, M. J. Mills, G. Teeter, M. Young "Silicon Wafer-Based Tandem Cells: The Ultimate Photovoltaic Solution?." in 28th European Photovoltaic Solar Energy Conference. (6 2013).
  • A. Haas, P. Sharps, D. Aiken, T. J. Grassman, J. A. Carlin, S. A. Ringel "Analysis of Short- and Long-Term Performance Goals for III/V on Active Si Concentrator Solar Cells." in 39th IEEE Photovoltaic Specialists Conference. (6 2013).
  • Chmielewski,Daniel,J; Grassman,Tyler,J; Carlin,Andrew,M; Carlin,John; Speelman,Austin; Ringel,Steven,A Metamorphic Tunnel Junctions for High Efficiency III-V/IV Multi-Junction Solar Cell Technology. in IEEE Photovoltaic Specialists Conference (PVSC). http://dx.doi.org/10.1109/PVSC.2013.6744285, (1 2013).
  • D. J. Chmielewski, T. J. Grassman, A. M. Carlin, C. Ratcliff, S. A. Ringel "Metamorphic Tunnel Junctions for High Efficiency III-V/IV Multi-Junction Solar Cell Technology." in 39th IEEE Photovoltaic Specialists Conference. (6 2013).
  • Tyler J. Grassman, Deep B. Shah, John A. Carlin, Steven A. Ringel "Exploration of Epitaxial Quantum Dots within Wide Band Gap Metamorphic Host Materials for Intermediate Band Solar Cells." in 39th IEEE Photovoltaic Specialists Conference. (6 2013).
  • Mansouri, Ibraheem Al, Bremner, Stephen, Ho-Baillie, Anita, Mehrvarz, Hamid, Hao, Xiaojing, Conibeer, Gavin, Green, Martin A., Grassman, Tyler J., Carlin, John A., Ringel, Steven A. "Design of bottom silicon solar cell for multijunction devices." in 39th IEEE Photovoltaic Specialists Conference. (6 2013).
  • Grassman, Tyler J. Ratcliff, Chris Carlin, Andrew M. Carlin, John A. Yang, Limei Mills, Michael J. Ringel, Steven A. "III-V/GaP Epitaxy on Si for Advanced Photovoltaics and Green Light Emitters." in ECS PRiME 2012. (3 2013).
  • Grassman, T.J.; Carlin, J.A.; Ratcliff, C.; Chmielewski, D.J. et al. "Epitaxially-Grown Metamorphic GaAsP/Si Dual-Junction Solar Cells." in 39th IEEE Photovoltaic Specialists Conference (PVSC). (1 2013).
  • Al Mansouri, I.; Bremner, S.; Ho-Baillie, A.; Mehrvarz, H. et al. "Design of Bottom Silicon Solar Cell for Multijunction Devices." in 39th IEEE Photovoltaic Specialists Conference (PVSC). (1 2013).
  • Grassman, T.J.; Shah, D.B.; Carlin, J.A.; Ringel, S.A. "Exploration of Epitaxial Quantum Dots within Wide Band Gap Metamorphic Host Materials for Intermediate Band Solar Cells." in 39th IEEE Photovoltaic Specialists Conference (PVSC). (1 2013).
  • Chmielewski, D.J.; Grassman, T.J.; Carlin, A.M.; Carlin, J. et al. "Metamorphic Tunnel Junctions for High Efficiency III-V/IV Multi-Junction Solar Cell Technology." in 39th IEEE Photovoltaic Specialists Conference (PVSC). (1 2013).
  • S. A. Ringel, J. A. Carlin, T. J. Grassman, B. Galiana, A. M. Carlin, C. Ratcliff, D. J. Chmielewski, L. Yang, M. J. Mills, I. Al-Mansouri, S. P. Bremner, A. Ho-Baillie, X. Hao, H. Mehrvarz, G. Conibeer, M. A. Green "Ideal GaP/Si Heterostructures Grown by MOCVD: III-V/Active-Si Subcells, Multijuntions, and MBE-to-MOCVD III-V/Si Interface Science." in 39th IEEE Photovoltaic Specialists Conference. (6 2013).

2012

  • Swaminathan,K; Grassman,T,J; Yang,L-M; Chmielewski,D; Mills,M; Ringel,S,A "Impact of threading dislocation density on metamorphic InxGa1-xAs and InzGa1-zP p-i-n photodetectors on GaAs." in Conference on Optical Components and Materials IX. (1 2012).
  • Grandal,Javier; Grassman,Tyler,J; Carlin,Andrew,M; Brenner,Mark,R; Galiana,Beatriz; Carlin,John,A; Yang,Limei; Mills,Michael,J; Ringel,Steven,A "Growth and characterization of InGaAs quantum dots on metamorphic GaAsP templates by molecular beam epitaxy." in 38th IEEE Photovoltaic Specialists Conference (PVSC). (6 2012).
  • Grassman,Tyler,J; Carlin,Andrew,M; Grandal,Javier; Ratcliff,Chris; Yang,Limei; Mills,Michael,J; Ringel,Steven,A "Spectrum-optimized Si-based III-V multijunction photovoltaics." in Conference on Physics, Simulation and Photonic Engineering of Photovoltaic Devices. (1 2012).
  • Carlin,Andrew,M; Grassman,Tyler,J; Brenner,Mark,R; Grandal,Javier; Ratcliff,Chris; Yang,Limei; Mills,Michael; Sharma,Prithu; Fitzgerald,Eugene,A; Ringel,Steven,A "Lattice-Matched GaP/SiGe Virtual Substrates for Low-Dislocation Density GaInP/GaAsP/Si Solar Cells." in 38th IEEE Photovoltaic Specialists Conference (PVSC). (6 2012).
  • Carlin, A.M.; Grassman, T.J.; Brenner, M.R.; Grandal, J. et al. "Lattice-Matched GaP/SiGe Virtual Substrates for Low-Dislocation Density GaInP/GaAsP/Si Solar Cells." (1 2012).
  • Carlin, A.M.; Grassman, T.J.; Brenner, M.R.; Grandal, J. et al. "Lattice-matched GaP/SiGe virtual substrates for low-dislocation density GaInP/GaAsP/Si solar cells." (11 2012).
  • Carlin, A.M.; Grassman, T.J.; Brenner, M.R.; Grandal, J. et al. "Lattice-Matched GaP/SiGe Virtual Substrates for Low-Dislocation Density GaInP/GaAsP/Si Solar Cells." in 38th IEEE Photovoltaic Specialists Conference (PVSC). (1 2012).
  • Grassman, T.J.; Carlin, A.M.; Grandal, J.; Ratcliff, C. et al. "Spectrum-optimized Si-based III-V multijunction photovoltaics." (4 2012).
  • Grandal, J.; Grassman, T.J.; Carlin, A.M.; Brenner, M.R. et al. "Growth and characterization of InGaAs quantum dots on metamorphic GaAsP templates by molecular beam epitaxy." in 38th IEEE Photovoltaic Specialists Conference (PVSC). (1 2012).
  • Grassman, T.J.; Ratcliff, C.; Carlin, A.M.; Carlin, J.A. et al. "III-V/GaP epitaxy on Si for advanced photovoltaics and green light emitters." (12 2012).
  • Grassman, T.J.; Ratcliff, C.; Carlin, A.M.; Carlin, J.A. et al. "III-V/GaP Epitaxy on Si for Advanced Photovoltaics and Green Light Emitters." (1 2012).
  • Swaminathan, K.; Grassman, T.J.; Yang, L-M.; Chmielewski, D. et al. "Impact of threading dislocation density on metamorphic InxGa1-xAs and InzGa1-zP p-i-n photodetectors on GaAs." (1 2012).
  • Grassman, T.J.; Carlin, A.M.; Grandal, J.; Ratcliff, C. et al. "Spectrum-optimized Si-based III-V multijunction photovoltaics." in Conference on Physics, Simulation and Photonic Engineering of Photovoltaic Devices. (1 2012).
  • Grassman, T.J.; Ratcliff, C.; Carlin, A.M.; Carlin, J.A. et al. "III-V/GaP Epitaxy on Si for Advanced Photovoltaics and Green Light Emitters." in 5th SiGe, Ge, and Related Compounds - Materials, Processing and Devices Symposium held at the 220th Meeting of the Electrochemical-Society (ECS). (1 2012).
  • Grassman, T.J.; Carlin, A.M.; Grandal, J.; Ratcliff, C. et al. "Spectrum-optimized Si-based III-V multijunction photovoltaics." (1 2012).
  • Swaminathan, K.; Grassman, T.J.; Yang, L-M.; Chmielewski, D. et al. "Impact of threading dislocation density on metamorphic InxGa1-xAs and InzGa1-zP p-i-n photodetectors on GaAs." in Conference on Optical Components and Materials IX. (1 2012).
  • Swaminathan, K.; Grassman, T.J.; Yang, L.M.; Chmielewski, D. et al. "Impact of threading dislocation density on metamorphic In xGa 1-xAs and In zGa 1-zP p-i-n photodetectors on GaAs." (4 2012).

2011

  • Grassman, T. J. Carlin, A. M. Swaminathan, K. Ratcliff, C. Grandal, J. Yang, L.-M. Mills, M. J. Ringel, S. A. "Expanding the Palette: Metamorphic Strategies over Multiple Lattice Constant Ranges for Extending the Spectrum of Accessible Photovoltaic Materials." in 37th IEEE Photovoltaic Specialists Conference. (6 2011).
  • Grassman, T.J.; Carlin, A.M.; Swaminathan, K.; Ratcliff, C. et al. "Expanding the palette: Metamorphic strategies over multiple lattice constant ranges for extending the spectrum of accessible photovoltaic materials." (12 2011).
  • Yang, L-M.; Swaminathan, K.; Grassman, T.; Ringel, S. et al. "Threading Dislocations in Metamorphic In0.20Ga0.80As Grown on GaAs Substrates." (7 2011).
  • L.-M. Yang, K. Swaminathan, T. Grassman, S. Ringel, M. Mills Threading Dislocations in Metamorphic In0.20Ga0.80As Grown on GaAs Substrates. in Microscopy and Microanalysis. http://dx.doi.org/10.1017/S1431927611009135, (8 2011).

2010

  • Grassman, T.J.; Carlin, A.M.; Ringel, S.A. "Metamorphic gaasp and ingap photovoltaic materials on Si for high-efficiency III-V/Si multijunction solar cells." (12 2010).
  • Grassman, T.J.; Brenner, M.R.; Carlin, A.M.; Rajagopalan, S. et al. Toward Metamorphic Multijunction GaAsP/Si Photovoltaics Grown on Optimized GaP/Si Virtual Substrates Using Anion-Graded GaAsyP1-y Buffers. in 34th IEEE Photovoltaic Specialists Conference. https://dx.doi.org/10.1109/PVSC.2009.5411489, (2 2010).
  • Grassman,T,J; Carlin,A,M; Ringel,S,A "METAMORPHIC GAASP AND INGAP PHOTOVOLTAIC MATERIALS ON SI FOR HIGH-EFFICIENCY III-V/SI MULTIJUNCTION SOLAR CELLS." in 35th IEEE Photovoltaic Specialists Conference. (1 2010).
  • Grassman, T.J.; Carlin, A.M.; Ringel, S.A. "METAMORPHIC GAASP AND INGAP PHOTOVOLTAIC MATERIALS ON SI FOR HIGH-EFFICIENCY III-V/SI MULTIJUNCTION SOLAR CELLS." in 35th IEEE Photovoltaic Specialists Conference. (1 2010).
  • Grassman, T.J.; Carlin, A.M.; Ringel, S.A.; IEEE, "METAMORPHIC GAASP AND INGAP PHOTOVOLTAIC MATERIALS ON SI FOR HIGH-EFFICIENCY III-V/SI MULTIJUNCTION SOLAR CELLS." (1 2010).

2009

  • Grassman,T,J; Brenner,M,R; Carlin,A,M; Rajagopalan,S; Unocic,R; DEHOFF,R; Mills,M; Fraser,H; Ringel,S,A "Toward Metamorphic Multijunction GaAsP/Si Photovoltaics Grown on Optimized GaP/Si Virtual Substrates Using Anion-Graded GaAsyP1-y Buffers." in 34th IEEE Photovoltaic Specialists Conference. (1 2009).

2007

  • Winn, D.L.; Grassman, T.J.; Kummel, A.C. "Electronic properties of adsorbates on in0.37Ga 0.63As(001)-(2×4)." (12 2007).
  • D. L. Winn, T. J. Grassman, A. C. Kummel "Electronic properties of adsorbates on In0.37Ga0.63As(001)-(2×4)." in 212th ECS Meeting. (9 2007).

2005

  • Kummel,A,C; Grassman,T; Winn,D,L; Hale,M,J; Sexton,J,Z; Passlack,M; Droopad,R "Influence of atomic structure on electronic structure for oxide-semiconductor interfaces.." in 229th National Meeting of the American-Chemical-Society (ACS). (3 2005).
  • Kummel, A.C.; Grassman, T.; Winn, D.L.; Hale, M.J. et al. "Influence of atomic structure on electronic structure for oxide-semiconductor interfaces.." in 229th National Meeting of the American-Chemical-Society. (3 2005).
  • Kummel, A.C.; Grassman, T.; Winn, D.L.; Hale, M.J. et al. "Influence of atomic structure on electronic structure for oxide-semiconductor interfaces.." (3 2005).

2004

  • Miller,K,A; Toal,S,J; Bodde,S,G; Sexton,J,Z; Tran,N; Grassman,T; Fruhberger,B; Ramirez,M,IM; Kummel,A,C; Schuller,I,K; TROGLER,W,C "Metallophthalocyanine based chemical sensors for chemical warfare agents.." in 227th National Meeting of the American-Chemical Society. (3 2004).
  • Miller, K.A.; Toal, S.J.; Bodde, S.G.; Sexton, J.Z. et al. "Metallophthalocyanine based chemical sensors for chemical warfare agents.." in 227th National Meeting of the American-Chemical Society. (3 2004).
  • Miller, K.A.; Toal, S.J.; Bodde, S.G.; Sexton, J.Z. et al. "Metallophthalocyanine based chemical sensors for chemical warfare agents.." (3 2004).