DataVXAdvanced Energy MaterialsPaper
journal article·2023-06

Strain Regulation via Pseudo Halide‐Based Ionic Liquid toward Efficient and Stable α‐FAPbI3 Inverted Perovskite Solar Cells

Xiaofen Jiang, Xue Wang, Xin Wu, Shoufeng Zhang, Baoze Liu, Dong Zhang, Bo Li, Peng Xiao, Fang Xu, Haipeng Lu, Tao Chen, Alex K.‐Y. Jen, Shangfeng Yang, Zonglong Zhu

Advanced Energy Materials· Volume 13· Issue 23
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Source abstract

Abstract

Abstract Inverted (p‐i‐n) perovskite solar cells have drawn great attention due to their outstanding stability and low‐temperature processibility. However, their power conversion efficiency (PCE) still lags behind conventional (n‐i‐p) devices mainly due to the lack of strategies to stabilize α‐FAPbI3 without changing the bandgap. In this work, a facile and effective strategy is reported to regulate the residual strain via pseudo halide‐based ionic liquids incorporation to stabilize α‐FAPbI3 perovskite in inverted perovskite solar cells (PVSCs). The employment of methylamine formate (MAFa) ionic liquid enables a homogenously stronger compressive strain to restrain the transition of shared‐corner PbI6 octahedron into shared‐face δ‐FAPbI3, as well as affecting the dynamic behavior of carriers and defects to achieve a record PCE (24.08%) among the reported inverted FAPbI3 perovskite solar cells up to now. In addition, the MAFa incorporation results in enhanced device stability, unencapsulated PVSC retains over 90% of its initial efficiency after stored in ambient environment (RH:30 ± 5%) for 1000 h. This work provides an efficient strategy to realize efficient and stable α‐FAPbI3 based inverted PVSCs to further catch up with the conventional ones.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Advancements in Solid Oxide Fuel Cells

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

CAS Key Laboratory of Materials for Energy Conversion Anhui Laboratory of Advanced Photon Science and Technology Department of Materials Science and Engineering University of Science and Technology of China Hefei 230026 P. R. China

Department of Chemistry City University of Hong Kong Kowloon 999077 Hong Kong

Department of Materials Science and Engineering City University of Hong Kong Kowloon 999077 Hong Kong

Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology Center for Advanced Material Diagnostic Technology and College of Engineering Physics Shenzhen Technology University Shenzhen 518118 P. R. China

Department of Chemistry The Hong Kong University of Science and Technology Kowloon Hong Kong SAR China

Hong Kong Institute for Clean Energy City University of Hong Kong Kowloon 999077 Hong Kong

City University of Hong Kong Shenzhen Research Institute Shenzhen Guangdong 518057 P. R. China

Funding

Innovation and Technology Fund · National Key Research and Development Program of China · National Natural Science Foundation of China

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