A unified description of non-radiative voltage losses in organic solar cells

Jean-Luc Brédas

doi:10.1117/12.2602808

3 August 2021 A unified description of non-radiative voltage losses in organic solar cells

Jean-Luc Brédas

Author Affiliations +

Proceedings Volume 11809, Organic, Hybrid, and Perovskite Photovoltaics XXII; 1180902 (2021) https://doi.org/10.1117/12.2602808
Event: SPIE Organic Photonics + Electronics, 2021, San Diego, California, United States

Abstract

Recent advances in organic solar cells are based on non-fullerene acceptors (NFAs) and come with reduced non-radiative voltage losses (ΔVnr). In this presentation, we show that, by contrast to the energy-gap-law dependence observed in conventional donor:fullerene blends, the ΔVnr values in state-of-the-art donor:NFA organic solar cells show no correlation with the energies of charge-transfer electronic states at donor:acceptor interfaces. By combining temperature-dependent electroluminescence experiments and dynamic vibronic simulations, a unified description of ΔVnr is reached for both fullerene- and NFA-based devices. The critical role that the thermal population of local exciton states plays in low-ΔVnr systems is also highlighted. Another interesting finding is that it is the photoluminescence yield of the pristine materials that defines the lower limit of ΔVnr.

Conference Presentation

Citation Download Citation

Jean-Luc Brédas "A unified description of non-radiative voltage losses in organic solar cells", Proc. SPIE 11809, Organic, Hybrid, and Perovskite Photovoltaics XXII, 1180902 (3 August 2021); https://doi.org/10.1117/12.2602808

Access the abstract

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

Subscribe to Digital Library

Receive Erratum Email Alert

Keywords/Phrases

Search In:

Publication Years