Princeton University

School of Engineering & Applied Science

Barry P. Rand

Associate Professor of Electrical Engineering

Associate Professor of Andlinger Center for Energy and the Environment

Room: B414 Engineering Quadrangle
Phone: +1-609-258-7692
Webpage: RandLab


  • 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. Improved outcoupling efficiency and stability of perovskite light emitting diodes using thin emitting layers,” L. Zhao, K.M. Lee, K. Roh, S.-U.-Z. Khan, B.P. Rand, Adv. Mater., 31, 1805836 (2019).

  2. Engineering perovskite nanocrystal surface termination for light emitting diodes with external quantum efficiency exceeding 15%,” Z. Xiao, R.A. Kerner, N. Tran, L. Zhao, G.D. Scholes, B.P. Rand, Adv. Funct. Mater., 29, 1807284 (2019).

  3. Mixed lead-tin halide perovskites for efficient and wavelength-tunable near-infrared light-emitting diodes,” W. Qiu, Z. Xiao, K. Roh, N.K. Noel, A. Shapiro, P. Heremans, B.P. Rand, Adv. Mater., 31, 1806105 (2019).

  4. "Ionic-electronic ambipolar transport in metal halide perovskites: Can electronic conductivity limit ionic diffusion?” R.A. Kerner, B.P. Rand, J. Phys. Chem. Lett., 9, 132 (2018).

  5. "The impact of local morphology on organic donor/acceptor charge transfer states," Y.L. Lin, M.A. Fusella, B.P. Rand, Adv. Energy Mater., 8, 1702816 (2018).

  6. "Band-like charge photogeneration at a crystalline organic donor/acceptor interface,” M.A. Fusella, A.N. Brigeman, M. Welborn, G.E. Purdum, Y. Yan, R.D. Schaller, Y.L. Lin, Y.-L. Loo, T. Van Voorhis, N.C. Giebink, B.P. Rand, Adv. Energy Mater., 8, 1701494 (2018).

  7. Donor/acceptor charge-transfer states at two-dimensional metal halide perovskite and organic semiconductor interfaces,” L. Zhao, Y.L. Lin, H. Kim, N.C. Giebink, B.P. Rand, ACS Energy Lett., 3, 2708 (2018).

  8. Ultrasensitive heterojunctions of graphene and 2D perovskites reveal spontaneous iodide loss,” L. Zhao, H. Tian, S.H. Silver, A. Kahn, T.-L. Ren, B.P. Rand, Joule, 2, 2133 (2018).

  9. "Influence of bulky organo-ammonium halide additive choice on the flexibility and efficiency of perovskite light-emitting devices," L. Zhao, N. Rolston, K.M. Lee, X. Zhao, M.A. Reyes-Martinez, N.L. Tran, Y.-W. Yeh, N. Yao, G.D. Scholes, Y.-L. Loo, A. Selloni, R.H. Dauskardt, B.P. Rand, Adv. Funct. Mater., 28, 1802060 (2018).

  10. 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).

  11. 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).

  12. 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).

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