Perovskite Single Crystals with Self-Cleaning Surface for Efficient Photovoltaics |
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Authors: | Nianqiao Liu Ning Li Changke Jiang Mingxuan Lv Jinming Wu Prof Zhaolai Chen |
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Institution: | State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100 P. R. China |
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Abstract: | Metal halide perovskite single crystals are promising for diverse optoelectronic applications. As a universal issue of solution-grown perovskite single crystals, surface contamination causes adverse effect on material properties and device performance. Herein, learning from the self-cleaning effect of lotus leaf, we address the surface contamination issue by introducing an amphiphilic long-chain organic amine into the perovskite crystal growth solution. Self-assembly of CTAC provides a hydrophobic crystal surface, inducing spontaneous removal of residual growth solution, which results in clean surface and better optoelectronic properties of perovskite single crystals. An impressive efficiency of 23.4 % is obtained, setting a new record for FAxMA1-xPbI3 single-crystal perovskite solar cells (PSCs). Moreover, our strategy also applies to perovskite single crystals with different morphology and composition, which may contribute to improvement of other single-crystal perovskite optoelectronic devices. |
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Keywords: | Perovskite Self-Cleaning Single Crystals Solar Cells Stability |
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