Imperial College London


Faculty of Natural SciencesDepartment of Physics

Research Postgraduate







H724Huxley BuildingSouth Kensington Campus





Joel has recently joined the Centre of Plastic Electronics CDT and will be completing his research project within Prof Ji-Seon Kim's group. The research project is supported by CSEM Brasil and is concerned with the stability of large area printed OPV devices. The main areas of interest are:

  • How do fullerene acceptor molecules in the active layer affect stability
  • Studying the morphology of blends that incoorporate new non-fullerene acceptors and determining how this relates to stability and performance
  • The nature and stability of the interface between the active layer and charge carrier layers

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, 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

Newman MJ, Speller EM, Barbe J, et al., 2018, Photo-stability study of a solution-processed small molecule solar cell system: correlation between molecular conformation and degradation, Science and Technology of Advanced Materials, Vol:19, ISSN:1468-6996, Pages:194-202

Murdock D, Harris SJ, Luke J, et al., 2014, Transient UV pump-IR probe investigation of heterocyclic ring-opening dynamics in the solution phase: the role played by n sigma* states in the photoinduced reactions of thiophenone and furanone, Physical Chemistry Chemical Physics, Vol:16, ISSN:1463-9076, Pages:21271-21279

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