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Control of vertical phase separation in high performance non-fullerene organic solar cell by introducing oscillating stratification preprocessing

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Abstract

Non-fullerene organic solar cell (NFOSC) has attracted tremendous attention due to their great potential for commercial applications. To improve its power conversion efficiency (PCE), generally, sequential solution deposition (SSD) methods have been employed to construct the graded vertical phase separation (VPS) of the bulk-heterojunction (BHJ) active layer for efficient exciton separation and charge transition. However, a variety of orthogonal solvents used in the SSD may lead to the unpredicted change in the BHJ morphology and introduce additional defects inside the BHJ bulk thus complicate the fabrication process. Here, a simple oscillating stratification preprocessing (OSP) is developed to facilitate the formation of graded VPS among the BHJ layer. As a result, a significant improvement is obtained in PCE from 10.96% to 12.03%, which is the highest value reported among PBDB-T: ITIC based NFOSC.

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Acknowledgements

This work was financially supported by the Foundation of National Natural Science Foundation of China (NSFC) (Grant Nos. 61421002, 61675041, and 51703019), and Sichuan Science and Technology Program (Grant Nos. 2019YFG0121, 2019YJ0178, 2020YFG0279, and 2020YFG0281), and the China Scholarship Council (No. 201806070051). This work is also sponsored by the Sichuan Province Key Laboratory of Display Science and Technology.

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  1. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China

    Dayong Zhang, Pu Fan, Jinyu Shi, Jian Zhong & Junsheng Yu

  2. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China

    Yifan Zheng

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  1. Dayong Zhang
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  2. Pu Fan
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Correspondence to Yifan Zheng, Jian Zhong or Junsheng Yu.

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Control of vertical phase separation in high performance non-fullerene organic solar cell by introducing oscillating stratification preprocessing

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Zhang, D., Fan, P., Shi, J. et al. Control of vertical phase separation in high performance non-fullerene organic solar cell by introducing oscillating stratification preprocessing. Nano Res. 14, 1319–1325 (2021). https://doi.org/10.1007/s12274-020-3169-y

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