We are concerned with describing the fundamental optical and electronic properties of organic and hybrid organic-inorganic semiconductor systems. We ultimately seek to exploit the unique properties of these materials to create novel electronic and optoelectronic devices. This interdisciplinary work involves elements of physics, chemistry, materials science and electrical engineering. Of particular focus is the improvement of organic and perovskite solar cells, organic light-emitting devices, and organic lasers.

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Education

• B.Sc.(Hons.), Physics, University of Manitoba, Canada, 2000
• M.A., Electrical Engineering, Princeton University, 2002
• Ph.D., Electrical Engineering, Princeton University, 2006

Honors and Awards

• Ronald L. and Janet A. Christenson Chair in Renewable Energy
• Fellow, UMN Institute on the Environment
• Leverhulme Trust Visiting Professor, Cavendish Laboratory, University of Cambridge
• Visiting Fellow, Clare Hall, University of Cambridge
• Horace T. Morse - UMN Alumni Association Award for Outstanding Contributions to Undergraduate Education
• College of Science and Engineering Outstanding Teacher Award
• ASM Bradley Stoughton Award for Young Teachers
• Institute on Renewable Energy and the Environment (IREE) Young Faculty Award
• 3M Nontenured Faculty Award

Selected Publications

• Carrier-gas assisted vapor deposition for highly tunable morphology of halide perovskite thin films, C.P. Clark, B. Voigt, E.S. Aydil, R.J. Holmes, Sustainable Energy and Fuels, Advance Article (2019)
• Formation of aligned periodic patterns during the crystallization of organic semiconductor thin films, J.S. Bangsund, T.R. Fielitz, T.J. Steiner, K. Shi, J.R. Van Sambeek, C.P. Clark, R.J. Holmes, Nature Materials, 18, 725 (2019)
• Intrinsic measurements of exciton transport in photovoltaic cells, T. Zhang, D.B. Dement, V.E. Ferry, R.J. Holmes, Nature Communications, 10, 1156 (2019)
• Probing Enhanced Exciton Diffusion in a Triplet-Sensitized Organic Photovoltaic Cell, K. Shi, I.J. Curtin, A.T. Healy, T. Zhang, D. Rai, D.A. Blank, R.J. Holmes, J. Phys. Chem. C., 124, 3489 (2020).
• Measurement of the triplet exciton diffusion length in organic semiconductors, D. Rai, R.J. Holmes, J. Materials Chemistry C, 7, 5695 (2019)