Decreasing exciton dissociation rates for reduced voltage losses in organic solar cells

6Citations
Citations of this article
12Readers
Mendeley users who have this article in their library.

Abstract

Enhancing the device electroluminescence quantum efficiency (EQEEL) is a critical factor in mitigating non-radiative voltage losses (VNR) and further improving the performance of organic solar cells (OSCs). While the common understanding attributes EQEEL in OSCs to the dynamics of charge transfer (CT) states, persistent efforts to manipulate these decay dynamics have yielded limited results, with the EQEEL of high-efficiency OSCs typically remaining below 10−2%. This value is considerably lower than that observed in high efficiency inorganic photovoltaic devices. Here, we report that EQEEL is also influenced by the dissociation rate constant of singlet states (kDS). Importantly, in contrast to the traditional belief that advocates maximizing kDS for superior photovoltaic quantum efficiency (EQEPV), a controlled reduction in kDS is shown to enhance EQEEL without compromising EQEPV. Consequently, a promising experimental approach to address the VNR challenge is proposed, resulting in a significant improvement in the performance of OSCs.

Cite

CITATION STYLE

APA

Wu, H., Lu, H., Li, Y., Zhou, X., Zhou, G., Pan, H., … Tang, Z. (2024). Decreasing exciton dissociation rates for reduced voltage losses in organic solar cells. Nature Communications, 15(1). https://doi.org/10.1038/s41467-024-46797-5

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free