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Ternary solvent strategy enhancing the photovoltaic performance of ternary polymer solar cells

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Abstract

In this contribution, we adopted ternary solvent strategy to improve the power conversion efficiency (PCE) of ternary polymer solar cells (PSCs)-based PBDB-T:ITIC:PC71BM photovoltaic system. The results showed that the PCE of PSCs prepared from ternary solvent was significantly higher than that prepared from binary solvent. Moreover, we also optimized the performance of ternary PBDB-T:ITIC:PC71BM solar cells by regulating the ratios of acceptors, and found this ternary PSCs showing the highest efficiency at 1:0.8:0.2. Through the analysis of the morphology and optical properties of active layers as well as the electrical properties of PSCs, the enhanced PCE of ternary PSCs was mainly due to the improvement of short-circuit current (JSC). Further, the enhanced JSC could be attributed to the optimized aggregation scale and phase separation structure of ternary active layer at the appropriate ratio of donor and acceptors. Which was conducive to enhance the charge mobility and charge transport equilibrium. Meanwhile, the charge recombination process could be suppressed well.

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Funding

This research was funded by the Genera Program of Chongqing Natural Science Foundation (CSTB2022NSCQ-MSX0309, CSTB2022NSCQ-MSX0545), the Science and Technology Research Program of the Chongqing Municipal Education Commission (KJQN202001323, KJZD-K202201303), the General Program of Yongchuan Natural Science Foundation (2022yc-jckx20017).

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  1. School of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160, China

    Rong Hu & Yurong Liu

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  1. Rong Hu
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Contributions

RH designed and directed the research. YL contributed to atomic force microscopy and steady-state absorption spectroscopy. RH contributed to J-V, EQE, and EIS measurements. Rong Hu wrote the manuscript composition, and all authors contributed to discuss the results.

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Correspondence to Rong Hu.

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Hu, R., Liu, Y. Ternary solvent strategy enhancing the photovoltaic performance of ternary polymer solar cells. J Mater Sci: Mater Electron 34, 1467 (2023). https://doi.org/10.1007/s10854-023-10888-8

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