Ultrafast Dynamics Group
Frédéric Laquai's Group


Jafar Khan

Research Scientists

Research Interests

Dr. Jafar’s major research interests are directed towards photophysics of semiconductors, in particular photocarrier recombination processes in highly excited crystals employing ultrafast transient absorption spectroscopy. In addition my research is focused applying the 4D electron microscope, a combination of spatial and femtosecond temporal resolution, implemented to study the field of materials science.

Selected Publications

  • Khan, J.I, Ashraf, R.S, Alamoudi, M.A., Nabi, M.A., Mohammed, H.N., Wadsworth, A., Firdaus, Y., Zhang, W., Anthopoulos, T.D., McCulloch,I., Laquai, F., P3HT Molecular Weight Determines the Performance of P3HT:O-IDTBR, Solar Cells Solar RRL 201900023 ( just accepted 2019)​​.
  • Firdaus, Y., Le Corre, V.M., Khan, J.I.,​ Kan, Z., Laquai, F., Beaujuge, P.M., Anthopoulos, T.D., Key Parameters Requirements for Non-fullerene Based Organic Solar Cells with Power Conversion Efficiency >20%, Adv. Sci, 1802028, (2019).
  • Keivanidis, P.E., Khan, J.I., ​Katzenmeier,L., Kan, Z., Limbu, S., Constantinou,M., Lariou, E., Constantinides, G., Hayes, S.C., Kim, J.S., Laquai, F., Impact of Structural Polymorphs on Charge Collection and Nongeminate Recombination in Organic Photovoltaic Devices, The Journal of Phys. Chem. C (122), 29141, (2018)
  • Peng, J., Khan, J.I., Liu, W., Ugur, E., Duong, T., Wu, Y., Shen, H., Wang, K., Dang, H., Aydin, E., Yang, X., Wan, Y., Weber, K.J., Catchpole, K.R.,  Laquai, F.,  Wolf, S.D., White, T.P., A Universal Double-Side Passivation for High Open-Circuit Voltage in Perovskite Solar Cells: Role of Carbonyl Groups in Poly(methyl methacrylate), Advanced Energy Materials (8), 1801208, (2018)
  • Alamoudi, M.A., Khan, J.I., Firdaus, Y., Wang, K., Andrienko, D., Beaujugue, P. M., Laquai, F., Impact of "Nonfullerene" Acceptor Core Structure on the Photophysics and Efficiency of Polymer Solar Cells,  ACS Energy Lett. (3), pp 802-811, (2018).
  • Khan, J.I., Adhikari, A.,Sun, J.,Priante, D.,Bose, R., Shaheen, B.S.,Ng, T. K.,Zhao, C.,Bakr, O.M.,Ooi, B.S.,Mohammed, O.F., Enhanced Optoelectronic Performance of a Passivated Nanowire-based Device: Key Information from Real-space Imaging using 4D Electron Microscopy, Small (12) pp 2313-2320 (2016).


  • Ph.D., University of Leeds, UK, 2010 
  • M.Sc., Physics, University of Copenhagen, Denmark, 2004
  • B.Sc., Physics, University of Copenhagen, Denmark, 2002

Professional Profile

  • 2013-Present: Postdoctoral Fellow, KAUST, Saudi Arabia
  • 2013-2013: Postdoctoral Fellow, University of Leeds, UK
  • 2010-2011: Postdoctoral Fellow, University of Leeds, UK