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

doi:10.1002/adma.201800544

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

249 Citations (Scopus)

Abstract

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.

Original language	English
Article number	1800544
Journal	Advanced Materials
Volume	30
Issue number	29
DOIs	https://doi.org/10.1002/adma.201800544
Publication status	Published - 19 Jul 2018

Keywords

grain-boundary engineering
methimazole
patch
perovskite solar cells
stability

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10.1002/adma.201800544

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

abstract = "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.",

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AU - Liu, Lang

AU - Huang, Sheng

AU - Lu, Yue

AU - Liu, Pengfei

AU - Zhao, Yizhou

AU - Shi, Congbo

AU - Zhang, Siyu

AU - Wu, Jiafeng

AU - Zhong, Haizheng

AU - Sui, Manling

AU - Zhou, Huanping

AU - Jin, Haibo

AU - Li, Yujing

AU - Chen, Qi

PY - 2018/7/19

Y1 - 2018/7/19

N2 - 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.

AB - 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.

KW - grain-boundary engineering

KW - methimazole

KW - patch

KW - perovskite solar cells

KW - stability

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

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Keywords

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