Revealing the Mechanism behind the Catastrophic Failure of n-i-p Type Perovskite Solar Cells under Operating Conditions and How to Suppress It

Ding Changzeng; Yin Li; Zhang LianpingHuang RongFan ShizhaoLuo QunLin JianLi FangsenZhao Chunosterbacka RonaldMa Chang-Qi

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Revealing the Mechanism behind the Catastrophic Failure of n-i-p Type Perovskite Solar Cells under Operating Conditions and How to Suppress It

机译：Revealing the Mechanism behind the Catastrophic Failure of n-i-p Type Perovskite Solar Cells under Operating Conditions and How to Suppress It

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The n-i-p type perovskite solar cells suffer unpredictable catastrophic failure under operation, which is a barrier for their commercialization. The fluorescence enhancement at Ag electrode edge and performance recovery after cutting the Ag electrode edge off prove that the shunting position is mainly located at the edge of device. Surface morphology and elemental analyses prove the corrosion of the Ag electrode and the diffusion of Ag+ ions on the edge for aged cells. Moreover, much condensed and larger Ag clusters are formed on the MoO3 layer. Such a contrast is also observed while comparing the central and the edge of the Ag/Spiro-OMeTAD film. Hence, the catastrophic failure mechanism can be concluded as photon-induced decomposition of the perovskite film and release reactive iodide species, which diffuse and react with the loose Ag clusters on the edge of the cell. The corrosion of the Ag electrode and the migration of Ag+ ions into Spiro-OMeTAD and perovskite films lead to the forming of conducting filament that shunts the cell. The more condensed Ag cluster on the MoO3 surface as well as the blocking of holes within the Spiro-OMeTAD/MoO3 interface successfully prevent the oxidation of Ag electrode and suppress the catastrophic failure.

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来源
《Advanced functional materials》 |2021年第40期|2103820.1-2103820.10|共10页
作者
Ding Changzeng; Yin Li; Zhang LianpingHuang RongFan ShizhaoLuo QunLin JianLi FangsenZhao Chunosterbacka RonaldMa Chang-Qi;
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作者单位

Univ Sci & Technol China, Sch Nanotech & Nanobion, 398 Jinzhai Rd, Hefei 230026, Peoples R China|Chinese Acad Sci, Printable Elect Res Ctr, Suzhou Inst Nanotec & Nanobion, SEID,SIP, 398 Ruoshui Rd, Suzhou 215123, Peoples R China;

Xian Jiaotong Liverpool Univ, Sch Adv Technol, Sch Sci, Suzhou 215123, Peoples R China;

Chinese Acad Sci, Printable Elect Res Ctr, Suzhou Inst Nanotec & Nanobion, SEID,SIP, 398 Ruoshui Rd, Suzhou 215123, Peoples R ChinaChinese Acad Sci, Vacuum Interconnected Nanotech Workstat, Suzhou Inst Nanotec & Nanobion, SEID,SIP, Suzhou 215123, Peoples R ChinaChinese Acad Sci, Nanodevices & Mat Div, Suzhou Inst Nanotec & Nanobion, SEID,SIP, Suzhou 215123, Peoples R ChinaAbo Akad Univ, Phys & Ctr Funct Mat, Fac Sci & Technol, Porthaninkatu 3, Turku 20500, Finland;

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catastrophic failure; ion migration; operation stability; perovskite solar cells;

Revealing the Mechanism behind the Catastrophic Failure of n-i-p Type Perovskite Solar Cells under Operating Conditions and How to Suppress It

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