Grain-Boundary “Patches” by In Situ Conversion to Enhance Perovskite Solar Cells Stability

Lang Liu, Sheng Huang, Yue Lu, Pengfei Liu, Yizhou Zhao, Congbo Shi, Siyu Zhang, Jiafeng Wu, Haizheng Zhong, Manling Sui, Huanping Zhou, Haibo Jin, Yujing Li*, Qi Chen

*此作品的通讯作者

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摘要

The power conversion efficiency of organic–inorganic hybrid perovskite solar cells has increased rapidly, but the device stability remains a big challenge. Previous studies show the grain boundary (GB) can facilitate ion migration and initiate device degradation. Herein, methimazole (MMI) is employed for the first time to construct a surface “patch” by in situ converting residual PbI2 at GBs. The resultant MMI–PbI2 complex can effectively suppress ion migration and inhibit diffusion of the metal electrodes. The origin of the surface “patch” effect and their working mechanisms are investigated experimentally and theoretically at the microscopic level. It hence demonstrates a simple and effective method to prolong the device stability in the context of GB engineering, which could be extensively applied to perovskite-based optoelectronics.

源语言英语
文章编号1800544
期刊Advanced Materials
30
29
DOI
出版状态已出版 - 19 7月 2018

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Liu, L., Huang, S., Lu, Y., Liu, P., Zhao, Y., Shi, C., Zhang, S., Wu, J., Zhong, H., Sui, M., Zhou, H., Jin, H., Li, Y., & Chen, Q. (2018). Grain-Boundary “Patches” by In Situ Conversion to Enhance Perovskite Solar Cells Stability. Advanced Materials, 30(29), 文章 1800544. https://doi.org/10.1002/adma.201800544