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Proceedings Paper

The role of donor-acceptor interfacial charge-transfer (CT) electronic states in photoelectric energy conversion in organic solar cells (Conference Presentation)
Author(s): Xiankai Chen

Paper 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.

Paper Details

Date Published: 10 September 2019
Proc. SPIE 11094, Organic, Hybrid, and Perovskite Photovoltaics XX, 1109409 (10 September 2019); doi: 10.1117/12.2528967
Show Author Affiliations
Xiankai Chen, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 11094:
Organic, Hybrid, and Perovskite Photovoltaics XX
Zakya H. Kafafi; Paul A. Lane; Kwanghee Lee, Editor(s)

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