Open AccessSpatio-Temporal Dynamics of Free and Bound Carriers in Photovoltaic Materials
Author(s) -
George C. Fish,
Jacques-E. Moser
Publication year - 2022
Publication title -
chimia
Language(s) - English
Resource type - Journals
eISSN - 2673-2424
pISSN - 0009-4293
DOI - 10.2533/chimia.2022.552
Subject(s) - ultrashort pulse , femtosecond , picosecond , photovoltaic system , charge carrier , nanotechnology , materials science , engineering physics , optoelectronics , laser , physics , electrical engineering , optics , engineering
Charge transfer and subsequent separation into free carriers are key processes that govern the efficiencies of third generation solar cell technologies based on donor-acceptor heterojunctions. As these processes typically occur on picosecond to femtosecond timescales, it is necessary to employ ultrafast spectroscopic techniques to further our understanding of these processes in order to provide vital information that can aide in furthering material design. Within the framework of the National Centre of Competence in Research "Molecular Ultrafast Science and Technology" (NCCR MUST), we have developed and utilized a suite of different ultrafast spectroscopic techniques to study charge generation, separation and recombination in a variety of small molecule based organic solar cells and lead halide perovskites. Here, we provide an overview of the main techniques used in our laboratory and the recent results obtained using these spectroscopic techniques.