All‐Inorganic Perovskite Solar Cells: Modification Strategies and Challenges

Author:

Li Xin‐Yi1,Sun Qi12,Xie Yue‐Min13ORCID,Fung Man‐Keung12

Affiliation:

1. Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Soochow University Suzhou Jiangsu 215123 P. R. China

2. Macao Institute of Materials Science and Engineering (MIMSE) MUST‐SUDA Joint Research Center for Advanced Functional Materials Zhuhai MUST Science and Technology Research Institute Macau University of Science and Technology Taipa Macau 999078 China

3. Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow University Suzhou Jiangsu 215123 P. R. China

Abstract

Cesium‐based all‐inorganic wide‐bandgap perovskite solar cells (AIWPSCs) have been demonstrated with exceptional optoelectronic properties such as intrinsic optical wide‐bandgap and high thermal stability, which make them suitable candidates for the front sub‐cells of tandem solar cells (TSCs). Passivation of perovskite surface and interface is a matter of common interest in this community since all‐inorganic perovskites always suffer from non‐ideal crystallization such as phase impurity, high defect density, and non‐uniform morphology. Despite these shortcomings, numerous efforts have been devoted in recent years to pursuing high‐performance AIWPSCs, which exhibit an abruptly increased power conversion efficiency (PCE) from 2.9% to over 21.0%. In view of not having a thorough summary about the advancements on AIWPSCs, herein, a comprehensive review is given to highlight the recent device performance progress of AIWPSC, particularly focusing on the strategies to passivate the defects of all‐inorganic perovskite, namely, additive engineering, solvent engineering, interface modification, and the exploration of new charge transport materials (CTMs) for improving the phase stability and PCE of AIWPSCs. Finally, a conclusive outlook on AIWPSCs will be given to provide our perspectives aiming to inspire the further development of AIWPSCs.

Funder

Suzhou Key Laboratory of Functional Nano and Soft Materials

Collaborative Innovation Center of Suzhou Nano Science and Technology

Publisher

Wiley

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