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

Xiankai Chen

doi:10.1117/12.2528967

Translator Disclaimer

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

Author Affiliations +

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.

Conference Presentation

Citation Download Citation

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

ACCESS THE FULL ARTICLE