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10 September 2019 The role of donor-acceptor interfacial charge-transfer (CT) electronic states in photoelectric energy conversion in organic solar cells (Conference Presentation)
Xiankai Chen
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Proceedings Volume 11094, Organic, Hybrid, and Perovskite Photovoltaics XX; 1109409 (2019) https://doi.org/10.1117/12.2528967
Event: SPIE Organic Photonics + Electronics, 2019, San Diego, California, United States
Abstract
A critical component of any donor-acceptor (D-A) bulk heterojunction organic solar cell is the appearance of inter-molecular charge-transfer (CT) electronic states at their D-A interfaces. These electronic states play a determining role in the photo-physical processes that transform the energy of the absorbed sunlight into electrical power. Here, through integrated multiscale theoretical simulations, we have illustrated how factors such as the details of the molecular packing at the D-A interfaces, the electronic polarization effects, and the extent of electron/hole delocalization around the interface impact the nature of the CT states. Moreover, we have also discussed how the hybridization between the CT and local-exciton (LE) states impacts the spectroscopy characteristics of D-A blends, the recombination rates and consequently the voltage losses, which need to be minimized.
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Xiankai Chen "The role of donor-acceptor interfacial charge-transfer (CT) electronic states in photoelectric energy conversion in organic solar cells (Conference Presentation)", Proc. SPIE 11094, Organic, Hybrid, and Perovskite Photovoltaics XX, 1109409 (10 September 2019); https://doi.org/10.1117/12.2528967
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KEYWORDS
Organic photovoltaics
Solar cells
Solar energy
Electronic components
Heterojunctions
Polarization
Spectroscopy
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