In Situ Stabilized CsPbI_3 for Air-Fabricated Inverted Inorganic Perovskite Photovoltaics with Wide Humidity Operating Window

Fu Sheng; Li Xiaodong; Wan JuanyongZhang WenxiaoSong WeijieFang Junfeng

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In Situ Stabilized CsPbI_3 for Air-Fabricated Inverted Inorganic Perovskite Photovoltaics with Wide Humidity Operating Window

机译：In Situ Stabilized CsPbI_3 for Air-Fabricated Inverted Inorganic Perovskite Photovoltaics with Wide Humidity Operating Window

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Inverted triiodine cesium lead (CsPbI3) perovskite solar cells (PSCs) are promising in photovoltaics owing to their ideal light absorption, non-volatile active layer, and avoidance of fragile Spiro-OmeTAD, especially as the top cell in tandem devices. However, they still exhibit far-lagging efficiency, and must be processed in a strictly controlled environment due to water-fearing CsPbI3. Here, a novel strategy to convert the harmful water erosions into an in situ stabilizer for efficient inverted CsPbI3 PSCs fabricated with a wide humidity operating window, is proposed. During air fabrication, maleic anhydride (MAAD) can react with water molecules in air to reduce moisture erosions, while the hydrolysis products (maleic acid, MAAC) control grains growth. After annealing, MAAC strongly binds to CsPbI3 grains as a shield to hamper phase transition and moisture penetration. A champion efficiency of 19.25% is obtained, which is the highest efficiency among the inverted inorganic PSCs. In parallel, the authors' optimized devices present efficiency of 18.39% even fabricated in relative humidity 60% condition. Moreover, the stability against various ages is improved, and the optimized devices remain at 96.8% of its initial efficiency after maximum power point tracking at 65 degrees C for 850 h.

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《Advanced functional materials》 |2022年第14期|2111116.1-2111116.8|共8页
作者
Fu Sheng; Li Xiaodong; Wan JuanyongZhang WenxiaoSong WeijieFang Junfeng;
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作者单位

Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China|Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China|East China Normal Univ, Minist Educ, Sch Phys & Elect Sci, Engn Res Ctr Nanopho;

Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China|Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China;

East China Normal Univ, Minist Educ, Sch Phys & Elect Sci, Engn Res Ctr Nanophoton & Adv Instrument, Shanghai 200241, Peoples R ChinaChinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China;

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正文语种英语
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air fabrication; CsPbI; (3); efficiency; inverted PSCs; stability; water erosion;

In Situ Stabilized CsPbI_3 for Air-Fabricated Inverted Inorganic Perovskite Photovoltaics with Wide Humidity Operating Window

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