Charge Carrier Dynamics in Disordered Materials for Solar Energy Conversion
James Durrant a
a Department of Chemistry and Centre for Plastic Electronics, Imperial College London, South Kensington Campus, London, United Kingdom
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)
Roma, Italy, 2019 May 12th - 15th
Organizers: Prashant Kamat, Filippo De Angelis and Aldo Di Carlo
Invited Speaker, James Durrant, presentation 049
DOI: https://doi.org/10.29363/nanoge.hopv.2019.049
Publication date: 11th February 2019

 

The kinetics of charge generation, separation and recombination are critical to the function of organic and perovskite solar cells and to photoelectrochemical water splitting. In my talk, I will address some of the factors determining these kinetics in these systems and how these impact upon device performance. Experimentally my talk will be based on the results of transient optical and optoelectronic measurements of both materials and devices. In organic solar cells, I will focus on a comparison of the kinetics of fullerene and non-fullerene acceptors, and the role of interfacial charge transfer states in limiting performance. For perovskite solar cells, I will focus on interfacial charge transfer and recombination in planar p-i-n MAPI3 based devices, and the impact of ion migration upon these kinetics. For photoelectrochemical water splitting, I will focus on the impact of space charge layers and junctions in separating charges.  The impact of tail states on charge carrier trapping and recombination, and thus on device performance, and the energetic cost of lifetime gain will recurring topics. Throughout my talk, I will try to highlight the similarities and difference between these materials and technologies, and the insights which can be learnt from comparison between these systems.

  

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