journal article·2025-05Open access

Manipulating Intermediate Surface Energy for High‐Performance All‐Inorganic Perovskite Photovoltaics

Hui Lu, Qian Wen, Ru Qin, Yunhui Han, Jiaqi Wang, Wenzhi Yang, Lei Wu, Longhui Liu, Bo Ma, Kui Zhao, Zhengguo Zhang, Bita Farhadi, Hongxiang Li, Kang Wang, Kai Wang, Shengzhong (Frank) Liu

Advanced Energy Materials· Volume 15· Issue 18

Abstract

Abstract The complete phase transition from DMAPbI3 and Cs4PbI6 intermediates to the final CsPbI3 perovskite phase is pivotal for fabricating high‐quality inorganic perovskite films. In this study, the reaction energy barrier between DMAPbI3 and Cs4PbI6 is sought to be reduced by increasing their surface energy, where a perfluorinated compound is designed using DFT modeling to saturate the surface of the intermediates to effectively prevent their crystalline growth. Consequently, the smaller intermediates with ultrahigh surface energy react more energetically to facilitate a rapid conversion to the desired perovskite phase. It is found that the resultant inorganic perovskite shows improved crystallinity and morphology, as demonstrated by suppressed non‐radiative recombination and prolonged carrier lifetimes. As a result, the optimized inorganic perovskite solar cells (PSCs) achieve a power conversion efficiency (PCE) of over 20%, along with significantly improved light and thermal stability. This work provides a way to regulate crystallization dynamics for advanced quality of inorganic perovskites.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Solid-state spectroscopy and crystallography

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

Affiliations

School of Materials Science & Engineering North Minzu University Yinchuan 750021 P. R. China

School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 P. R. China

School of Chemistry and Chemical Engineering North Minzu University Yinchuan 750021 P. R. China

Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy Center of Materials Science and Optoelectronics Engineering Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China

College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. China

CNNP Optoelectronics Technology 2828 Canghai Road, Lingang Shanghai 201311 P. R. China

Funding

Natural Science Foundation of Ningxia Province · China Postdoctoral Science Foundation · National Natural Science Foundation of China · Graduate Innovation Project of North Minzu University · North Minzu University · Higher Education Discipline Innovation Project · Fundamental Research Funds for the Central Universities · Natural Science Foundation of Liaoning Province

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