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Superior Textured Film and Process Tolerance Enabled by Intermediate-State Engineering for High-Efficiency Perovskite Solar Cells.


ABSTRACT: As the power conversion efficiency (PCE) of perovskite solar cells (PSCs) is increased to as high over 25%, it becomes pre-eminent to study a scalable process with wide processing window to fabricate large-area uniform perovskite films with good light-trapping performance. A stable and uniform intermediate-state complex film is obtained by using tetramethylene sulfoxide (TMSO), which extends the annealing window to as long as 20 min, promotes the formation of a high-quality perovskite film with larger grains (over 400 nm) and spontaneously forms the surface texture to result in an improved fill factor and open-circuit voltage (V oc). Moreover, the superior surface texture significantly increases the long-wavelength response, leading to an improved short-circuit current density (J sc). As a result, the maximum PCE of 21.14% is achieved based on a simple planar cell structure without any interface passivation. Moreover, a large area module with active area of 6.75 cm2 is assembled using the optimized TMSO process, showing efficiency as high as 16.57%. The study paves the way to the rational design of highly efficient PSCs for potential scaled-up production.

SUBMITTER: Wang S 

PROVIDER: S-EPMC7055579 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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Superior Textured Film and Process Tolerance Enabled by Intermediate-State Engineering for High-Efficiency Perovskite Solar Cells.

Wang Shubo S   Chen Yiqi Y   Li Ruiyi R   Xu Yibo Y   Feng Jiangshan J   Yang Dong D   Yuan Ningyi N   Zhang Wen-Hua WH   Liu Shengzhong Frank SF   Ding Jianning J  

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20200120 5


As the power conversion efficiency (PCE) of perovskite solar cells (PSCs) is increased to as high over 25%, it becomes pre-eminent to study a scalable process with wide processing window to fabricate large-area uniform perovskite films with good light-trapping performance. A stable and uniform intermediate-state complex film is obtained by using tetramethylene sulfoxide (TMSO), which extends the annealing window to as long as 20 min, promotes the formation of a high-quality perovskite film with  ...[more]

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