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Tyler Grassman

  • Assistant Professor, Materials Science Engineering
  • Dept. of Materials Science and Engineeringg
    488 Watts Hall
    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.

Chapters

2011

  • S. A. Ringel, T. J. Grassman. 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, Boca Raton: CRC Press.

Journal Articles

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.
  • R. M. France, F. Dimroth, T. J. Grassman and R. R. King, 2016, Metamorphic epitaxy for multijunction solar cells. MRS Bulletin 41, no. 3, 202 - 209.

2015

  • 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.
  • S. D. Carnevale, J. I. Deitz, J. A. Carlin, Y. N. Picard, D. W. McComb, M. D. Graef, S. A. Ringel and T. J. Grassman, 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.
  • 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.
  • 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 -
  • 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.
  • 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 -
  • 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.

2014

2013

  • 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 -

2011

  • 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 -
  • 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 -
  • 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.

2010

  • Grassman,Tyler,J; Brenner,Mark,R; Gonzalez,Maria; Carlin,Andrew,M; Unocic,Raymond,R; Dehoff,Ryan,R; Mills,Michael,J; Ringel,Steven,A, 2010, "Characterization of Metamorphic GaAsP/Si Materials and Devices for Photovoltaic Applications." IEEE TRANSACTIONS ON ELECTRON DEVICES 57, no. 12, 3361 - 3369.
  • Lee,Joon,Sung; Bishop,Sarah,R; Grassman,Tyler,J; Kummel,Andrew,C, 2010, "Plasma nitridation of Ge(100) surface studied by scanning tunneling microscopy." SURFACE SCIENCE 604, no. 15-16, 1239 - 1246.

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.
  • Tran,N,L; Bishop,S,R; Grassman,T,J; Poon,G,C; Bohrer,F,I; TROGLER,W,C; Kummel,A,C, 2009, "NO chemisorption dynamics on thick FePc and ttbu-FePc films." JOURNAL OF CHEMICAL PHYSICS 130, no. 17, 174305 -
  • Feldwinn,Darby,L; Clemens,Jonathon,B; Shen,Jian; Bishop,Sarah,R; Grassman,Tyler,J; Kummel,Andrew,C; Droopad,Ravi; Passlack,Matthias, 2009, "Anomalous hybridization in the In-rich InAs(001) reconstruction." SURFACE SCIENCE 603, no. 22, 3321 - 3328.
  • Grassman,T,J; Brenner,M,R; Rajagopalan,S; Unocic,R; DEHOFF,R; Mills,M; Fraser,H; Ringel,S,A, 2009, "Control and elimination of nucleation-related defects in GaP/Si(001) heteroepitaxy." APPLIED PHYSICS LETTERS 94, no. 23, 232106 -

2008

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

2007

  • Winn,Darby,L; Hale,Michael,J; Grassman,Tyler,J; Kummel,Andrew,C; Droopad,Ravi; Passlack,Matthias, 2007, "Direct and indirect causes of Fermi level pinning at the SiO/GaAs interface." JOURNAL OF CHEMICAL PHYSICS 126, no. 8, 084703 -
  • Winn,Darby,L; Hale,Michael,J; Grassman,Tyler,J; Sexton,Jonathan,Z; Kummel,Andrew,C, 2007, "Electronic properties of adsorbates on GaAs(001)-c(2x8)/(2x4)." JOURNAL OF CHEMICAL PHYSICS 127, no. 13, 134705 -

2005

  • Hale,M,J; Winn,D,L; Grassman,T,J; Kummel,A,C; Droopad,R, 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, 124702 -

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.

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.

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.
  • 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.

Unknown

Papers in Proceedings

2016

2015

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. JOURNAL: "40th IEEE Photovoltaic Specialist Conference." in 40th IEEE Photovoltaic Specialist Conference. http://dx.doi.org/10.1109/pvsc.2014.6925512, (6 2014). 2800 - 2803.
  • 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. JOURNAL: "IEEE PHOTOVOLTAIC SPECIALIST CONFERENCE (PVSC)." in IEEE Photovoltaic Specialists Conference (PVSC). http://dx.doi.org/10.1109/pvsc.2014.6925512, (1 2014). 2800 - 2803.
  • 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." JOURNAL: "Proceedings of the SPIE 8981." in Proceedings of the SPIE 8981. (3 2014). 898118 -
  • J. Deitz, S. Carnevale, M. De Graef, Y. N. Picard, S. A. Ringel, T. J. Grassman, D. W. McComb "Using Electron Channeling Contrast Imaging for Misfit Dislocation Characterization in Heteroepitaxial III-V/Si Thin Films." JOURNAL: "Microscopy and Microanalysis." in Microscopy and Microanalysis. (8 2014). 552 - 553.

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. JOURNAL: "39th IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)." in IEEE Photovoltaic Specialists Conference (PVSC). http://dx.doi.org/10.1109/PVSC.2013.6744285, (1 2013). 882 - 885.
  • 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." JOURNAL: "39th IEEE Photovoltaic Specialists Conference." in 39th IEEE Photovoltaic Specialists Conference. (6 2013). 0867 - 0872.
  • 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. JOURNAL: "IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)." in IEEE Photovoltaic Specialists Conference (PVSC). http://dx.doi.org/10.1109/pvsc.2013.6745159, (1 2013). 3310 - 3314.
  • 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. JOURNAL: "2013 IEEE 39TH PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)." in 39th IEEE Photovoltaic Specialists Conference (PVSC). http://dx.doi.org/10.1109/PVSC.2013.6744282, (1 2013). 867 - 872.
  • 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." JOURNAL: "39th IEEE Photovoltaic Specialists Conference." in 39th IEEE Photovoltaic Specialists Conference. (6 2013). 0284 - 0287.
  • 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." JOURNAL: "39th IEEE Photovoltaic Specialists Conference." in 39th IEEE Photovoltaic Specialists Conference. (6 2013). 0882 - 0885.
  • 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." JOURNAL: "ECS Transactions." in ECS PRiME 2012. (3 2013). 321 -
  • 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." JOURNAL: "39th IEEE Photovoltaic Specialists Conference." in 39th IEEE Photovoltaic Specialists Conference. (6 2013). 3383 - 3388.
  • Tyler J. Grassman, John A. Carlin, Chris Ratcliff, Daniel J. Chmielewski, Steven A. Ringel "Epitaxially-Grown Metamorphic GaAsP/Si Dual-Junction Solar Cells." JOURNAL: "39th IEEE Photovoltaic Specialists Conference." in 39th IEEE Photovoltaic Specialists Conference. (6 2013). 0149 - 0153.
  • 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." JOURNAL: "39th IEEE Photovoltaic Specialists Conference." in 39th IEEE Photovoltaic Specialists Conference. (6 2013). 3310 - 3314.
  • 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?." JOURNAL: "39th IEEE Photovoltaic Specialists Conference." in 28th European Photovoltaic Solar Energy Conference. (6 2013). 7 - 10.

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." JOURNAL: "38TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE." in 38th IEEE Photovoltaic Specialists Conference (PVSC). (6 2012). 918 - 921.
  • 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. BELLINGHAM, (1 2012). 82560R -
  • 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. BELLINGHAM, (1 2012). 82571A -
  • 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." JOURNAL: "38TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE." in 38th IEEE Photovoltaic Specialists Conference (PVSC). (6 2012). 1783 - 1787.

2011

  • L.-M. Yang, K. Swaminathan, T. Grassman, S. Ringel, M. Mills Threading Dislocations in Metamorphic In0.20Ga0.80As Grown on GaAs Substrates. JOURNAL: "Microscopy and Microanalysis." in Microscopy and Microanalysis. http://dx.doi.org/10.1017/S1431927611009135, (8 2011). 1652 - 1653.
  • 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." JOURNAL: "37th IEEE Photovoltaic Specialists Conference." in 37th IEEE Photovoltaic Specialists Conference. (6 2011). 003375 -

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." JOURNAL: "35TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE." in 35th IEEE Photovoltaic Specialists Conference. (1 2010). 2029 - 2033.

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." JOURNAL: "2009 34TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE, VOLS 1-3." in 34th IEEE Photovoltaic Specialists Conference. (1 2009). 2011 - 2016.
  • Grassman,T,J; Bishop,S,R; Kummel,A,C "Density functional theory study of first-layer adsorption of ZrO2 and HfO2 on Ge(100)." JOURNAL: "MICROELECTRONIC ENGINEERING." in 4th IEEE International Symposium on Advanced Gate Stack Technology (ISAGST). (3 2009). 249 - 258.

2007

  • D. L. Winn, T. J. Grassman, A. C. Kummel "Electronic properties of adsorbates on In0.37Ga0.63As(001)-(2×4)." JOURNAL: "ECS Transactions." in 212th ECS Meeting. (9 2007). 441 -

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.." JOURNAL: "ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY." in 229th National Meeting of the American-Chemical-Society (ACS). (3 2005). U730 - U730.

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.." JOURNAL: "ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY." in 227th National Meeting of the American-Chemical Society. (3 2004). U1258 - U1258.