Princeton University

School of Engineering & Applied Science

Barry P. Rand

Assistant Professor of Electrical Engineering &

Andlinger Center for Energy and the Environment

Room: B414 Engineering Quadrangle
Phone: +1-609-258-7692
Webpage: RandLab: Thin film optics, materials and devices


  • PhD, Princeton University, 2007
  • BE, Electrical Engineering, The Cooper Union, 2001

Thin film electronics made from emerging semiconductors have the capacity to be pervasive within our daily lives. Notably, some thin film devices have established themselves quite successfully, such as the OLED for flat panel displays. The goal of my research is to work on emerging device concepts and materials to help to realize the next generation of thin film electronic devices. Specifically, we try to understand and leverage the unique electronic and optical properties of thin film materials, and in particular semiconductors. This includes the use of molecular, perovskite, and chalcogenide (e.g. oxide) semiconductors, as well as nanostructured quantized matter for emerging applications in solar cells, light emitting devices, and transistors. Studies that we conduct range from those on fundamental optical and electrical characterization to device physics and engineering to processing. Being interdisciplinary in nature, our work resides at the intersection of electrical engineering, materials science, physics, and chemistry, and we work with materials processed either in vacuum or via solution-phase. Our labs therefore consist of infrastructure for the preparation and testing of thin films and devices.

Honors and Awards

  • ONR Young Investigator Program Award (2016)
  • DARPA Young Faculty Award (2015)
  • DuPont Young Professor Award (2015)
  • 3M Nontenured Faculty Award (2014)

Selected Publications

  1. In-situ preparation of metal halide perovskite nanocrystal thin films for improved light-emitting devices,” L. Zhao, Y.-W. Yeh, N.L. Tran, F. Wu, Z. Xiao, R.A. Kerner, Y.L. Lin, G.D. Scholes, N. Yao, B.P. Rand, ACS Nano, 11, 3957 (2017).

  2. Efficient perovskite light-emitting diodes featuring nanometre-sized crystallites,” Z. Xiao, R.A. Kerner, L. Zhao, N.L. Tran, K.M. Lee, T.-W. Koh, G.D. Scholes, B.P. Rand, Nat. Photon., 11, 108 (2017).

  3. Homoepitaxy of crystalline rubrene thin films,” M.A. Fusella, F. Schreiber, K. Abbasi, J.J. Kim, A.L. Briseno, B.P. Rand, Nano Lett., 17, 3040 (2017).

  4. Electrical stress influences the efficiency of CH3NH3PbI3 perovskite light emitting devices,” L. Zhao, J. Gao, Y.L. Lin, Y.-W. Yeh, K.M. Lee, N. Yao, Y.-L. Loo, B.P. Rand, Adv. Mater., 29, 1605317 (2017).

  5. Linking chemistry at the TiO2/CH3NH3PbI3 interface to current-voltage hysteresis,” R.A. Kerner, B.P. Rand, J. Phys. Chem. Lett., 8, 2298 (2017).

  6. Enhanced sub-bandgap efficiency of a solid-state organic intermediate band solar cell using triplet-triplet annihilation,” Y.L. Lin, M. Koch, A.N. Brigeman, D.M.E. Freeman, L. Zhao, H. Bronstein, N.C. Giebink, G.D. Scholes, B.P. Rand, Energy Environ. Sci., 10, 1465 (2017).

  7. Use of an underlayer for large area crystallization of rubrene thin films,” M.A. Fusella, S. Yang, K. Abbasi, H.H. Choi, Z. Yao, V. Podzorov, A. Avishai, B.P. Rand, Chem. Mater., 29, 6666 (2017).

  8. Enhanced outcoupling in flexible organic light-emitting diodes on scattering polyimide substrates,” K.M. Lee, R. Fardel, L. Zhao, C.B. Arnold, B.P. Rand, Org. Electron., 51, 471 (2017).

  9. Redox chemistry dominates the degradation and decomposition of metal halide perovskite optoelectronic devices,” L. Zhao, R.A. Kerner, Z. Xiao, Y.L. Lin, K.M. Lee, J. Schwartz, B.P. Rand, ACS Energy Lett., 1, 595 (2016).

  10. Morphological tuning of the energetics in singlet fission organic solar cells,” Y.L. Lin, M.A. Fusella, O.V. Kozlov, X. Lin, A. Kahn, M.S. Pshenichnikov, B.P. Rand, Adv. Funct. Mater.26, 6489 (2016).

  11. Ultrasmooth metal halide perovskite thin films via sol-gel processing,” R.A. Kerner, L. Zhao, Z. Xiao, B.P. Rand, J. Mater. Chem. A, 4, 8308 (2016).

  12. Enhanced outcoupling in organic light emitting diodes via a high-index contrast scattering layer,” T.-W. Koh, J.A. Spechler, K.M. Lee, C.B. Arnold, B.P. Rand, ACS Photonics, 2, 1366 (2015).

  13. Metal nanocluster light-emitting devices with suppressed parasitic emission and improved efficiency: Exploring the impact of photophysical properties,” T.-W. Koh, A.M. Hiszpanski, M. Sezen, A. Naim, T. Galfsky, A. Trivedi, Y.-L. Loo, V.M. Menon, B.P. Rand, Nanoscale7, 9140 (2015).

  14. [BOOK] “Organic Solar Cells: Fundamentals, Devices, and Upscaling,” edited by B.P. Rand and H. Richter, Pan Stanford Publishing, ISBN-13: 978-9814463652 (2014).

  15. “Microcrystalline organic thin film solar cells,” B. Verreet, P. Heremans, A. Stesmans, B.P. Rand, Adv. Mater., 25, 5504 (2013).