Morphology Optimization of the Photoactive Layer through Crystallinity and Miscibility Regulation for High-performance Polymer Solar Cells

Hang Yang; Sunan Bao; Naizhe Cui; Hongyu Fan; Kewei Hu; Chaohua Cui; Yongfang Li

doi:10.1002/anie.202216338

Morphology Optimization of the Photoactive Layer through Crystallinity and Miscibility Regulation for High-performance Polymer Solar Cells

Angew Chem Int Ed Engl. 2023 Feb 1;62(6):e202216338. doi: 10.1002/anie.202216338. Epub 2022 Dec 28.

Authors

Hang Yang¹, Sunan Bao¹, Naizhe Cui¹, Hongyu Fan¹, Kewei Hu¹, Chaohua Cui^{1

2}, Yongfang Li^{1

2

3}

Affiliations

¹ Laboratory of Advanced Optoelectronic Materials, Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and Devices, College of Chemistry Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.
² Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, Jiangsu, P. R. China.
³ Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.

PMID: 36478504
DOI: 10.1002/anie.202216338

Abstract

On the premise of strongly crystalline materials involved, it is a challenge to control the phase separation of bulk-heterojunction donor/acceptor active layer to fabricate high-performance polymer solar cells (PSCs). Herein, we develop a molecular design strategy of the third component to synthesize three guest materials (namely BTPT, BTP-Th, and BTP-2Th) to address this issue. We investigate and reveal the effect of crystallinity and miscibility of the third component in controlling the phase separation of Y6-derivatives-based blend film. As a result, a remarkable power-conversion efficiency of 18.53 % is obtained in the ternary PSC based on PTQ10 : m-BTP-PhC6 with BTP-Th as the third component, which is a significant improvement with regard to the efficiency of 17.22 % for the control binary device. Our study offers a molecular design strategy to develop a third component for building ternary PSCs in terms of crystallinity and miscibility regulation.

Keywords: Miscibility; Morphology; Power Conversion Efficiency; Ternary Polymer Solar Cells; Y6 Derivative Third Component.

Abstract

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