Imperial College London


Faculty of Natural SciencesDepartment of Physics

Research Assistant for Photovoltaics







H724Huxley BuildingSouth Kensington Campus





Joel is in the final year of his PhD in the Nanoanalysis Group under the supervision of Prof Ji-Seon Kim and Dr Diego Bagnis. Joel's research is funded by the EPSRC and also by CSEM Brasil, with whom he spent a few months with in 2019 in Belo Horizonte.

Joel's main research interests include:

  • The molecular origin of stability in non-fullerene acceptor organic photovoltaics, particularly the role of morphology and molecular conformation
  • The use of organic photovoltaics for indoor and low-light applications, especially the light-soaking effect and its relationship to interfacial energetics
  • The discrepancy between energy level measurements of organic semiconductors and how this is correlated to materials properties

Alongside these main themes Joel has worked on many collaborations throughout his PhD looking at the energetic and structural properties of organic and perovskite semiconductors.

Joel graduated from  the University of Bristol in 2014 with a First Class Honours undergraduate master's degree in  Chemistry. His master's thesis was a study of the photo-induced ring opening of some heterocyclic molecules using ultrafast transient spectroscopic techniques.

Selected Publications

Journal Articles

Luke J, Correa L, Rodrigues J, et al., 2021, A Commercial Benchmark: Light-Soaking Free, Fully Scalable, Large-Area Organic Solar Cells for Low-Light Applications, Advanced Energy Materials, Vol:11, ISSN:1614-6832

Wu J, Luke J, Lee HKH, et al., 2019, Tail state limited photocurrent collection of thick photoactive layers in organic solar cells, Nature Communications, Vol:10, ISSN:2041-1723

Speller EM, Clarke AJ, Luke J, et al., 2019, From fullerene acceptors to non-fullerene acceptors: prospects and challenges in the stability of organic solar cells, Journal of Materials Chemistry A, ISSN:2050-7488

Luke J, Speller EM, Wadsworth A, et al., 2019, Twist and degrade – Impact of molecular structure on the photostability of non-fullerene acceptors and their photovoltaic blends, Advanced Energy Materials, Vol:9, ISSN:1614-6832, Pages:1-14

More Publications