Dr Jafar Khan

Dr Jafar Khan

Lecturer

Faculty and Department

  • Faculty of Science and Engineering
  • School of Natural Sciences

Qualifications

  • PhD / DPhil (University of Leeds)

Summary

Jafar's research is focused on ultrafast time resolved spectroscopy of energy harvesting materials, specifically photophysics of organic and perovskite solar cells. Transient absorption spectroscopy and time resolved photoluminescence spectroscopy are used to evaluate the efficiency limiting processes in photovoltaic and optoelectronic devices. Jafar's interest is directed towards understanding of the fundamental photophysics taking place in the solar cell's absorber layer and at the respective interfaces formed by the adjacent charge transport layers by applying time resolved spectroscopy.

Jafar has published more than 50 journal articles.

1st year experimental labs

2nd year experimental labs

Introduction to optics

3rd year Research skills: Introduction to ultrafast spectroscopy

Recent outputs

View more outputs

Journal Article

Evaluation of interfacial photophysical processes by time-resolved optical spectroscopy in perovskite solar cells

Khan, J. I., Yang, Y., Palmer, J. R., Tyndall, S. B., Chaudhuri, S., Liu, C., …Sargent, E. H. (in press). Evaluation of interfacial photophysical processes by time-resolved optical spectroscopy in perovskite solar cells. Matter, https://doi.org/10.1016/j.matt.2024.05.046

Thermally-Induced Degradation in PM6:Y6-Based Bulk Heterojunction Organic Solar Cells

Alam, S., Aldosari, H., Petoukhoff, C. E., Váry, T., Althobaiti, W., Alqurashi, M., …Laquai, F. (2024). Thermally-Induced Degradation in PM6:Y6-Based Bulk Heterojunction Organic Solar Cells. Advanced Functional Materials, 34(6), Article 2308076. https://doi.org/10.1002/adfm.202308076

28.2%-efficient, outdoor-stable perovskite/silicon tandem solar cell

Liu, J., Aydin, E., Yin, J., De Bastiani, M., Isikgor, F. H., Rehman, A. U., …De Wolf, S. (2021). 28.2%-efficient, outdoor-stable perovskite/silicon tandem solar cell. Joule, 5(12), 3169-3186. https://doi.org/10.1016/j.joule.2021.11.003

Charge Carrier Recombination at Perovskite/Hole Transport Layer Interfaces Monitored by Time-Resolved Spectroscopy

Khan, J. I., Isikgor, F. H., Ugur, E., Raja, W., Harrison, G. T., Yengel, E., …Laquai, F. (2021). Charge Carrier Recombination at Perovskite/Hole Transport Layer Interfaces Monitored by Time-Resolved Spectroscopy. ACS Energy Letters, 6(12), 4155-4164. https://doi.org/10.1021/acsenergylett.1c01931

Impact of Acceptor Quadrupole Moment on Charge Generation and Recombination in Blends of IDT-Based Non-Fullerene Acceptors with PCE10 as Donor Polymer

Khan, J. I., Alamoudi, M. A., Chaturvedi, N., Ashraf, R. S., Nabi, M. N., Markina, A., …Laquai, F. (2021). Impact of Acceptor Quadrupole Moment on Charge Generation and Recombination in Blends of IDT-Based Non-Fullerene Acceptors with PCE10 as Donor Polymer. Advanced Energy Materials, 11(28), Article 2100839. https://doi.org/10.1002/aenm.202100839

Research interests

Ultrafast spectroscopy, Hybrid and organic photovoltaics, photophysics of semiconductors, transient absorption spectroscopy, time resolved photoluminescence

Postgraduate supervision

Ultrafast Spectroscopy on hybrid solar cells.

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