Issue 7, 2022

Improving the device performance of organic solar cells with immiscible solid additives

Abstract

Morphology optimization is key for the high-performance of organic solar cells (OSCs). Herein, we develop a solid additive (i.e. uv-9) showing immiscibility with active layers for morphology control, and comprehensively study its effect on the morphology evolution and device performance of PM6:Y6 OSCs. The addition of uv-9 leads to more refined phase separation and stronger molecular packing in PM6:Y6 blend films, and improves the charge generation, exciton dissociation, charge transport and collection, which contribute to higher photocurrent and fill factor for PM6:Y6 OSCs. Consequently, the OSC device with the uv-9 solid additive exhibits an improvement in the power conversion efficiency from 16.00% to 17.18%, compared to the control device without an additive. Moreover, the generality of uv-9 as an effective solid additive has been verified by applying it to diverse OSCs. This work suggests a new class of solid additives to optimize the morphology of OSCs for high performance.

Graphical abstract: Improving the device performance of organic solar cells with immiscible solid additives

Supplementary files

Article information

Article type
Paper
Submitted
06 Sep 2021
Accepted
21 Oct 2021
First published
25 Oct 2021

J. Mater. Chem. C, 2022,10, 2749-2756

Improving the device performance of organic solar cells with immiscible solid additives

S. Chen, C. He, Y. Li, T. Chen, X. Xia, W. Fu, M. Shi, X. Lu, L. Zuo and H. Chen, J. Mater. Chem. C, 2022, 10, 2749 DOI: 10.1039/D1TC04222J

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