Crystallization Pathway Dictates Performance: Unraveling Microstructural Evolution toward Efficient and Stable Inorganic Perovskite Solar Cells
Source abstract
Abstract
The crystallization evolution in solution-processed films is critical to the performance and stability of perovskite solar cells. However, the crystallization kinetics of all-inorganic perovskites remain poorly understood due to experimental challenges in observing polycrystalline cluster kinetics during annealing. Using temperature-controlled laser scanning confocal microscopy, we performed in situ monitoring during annealing. Results show that enhanced dicoumarol (DIC)–perovskite precursor interactions promote spontaneous formation of DIC-Cs + [PbI 3- x Br x ] − (δ-phase) heterogeneous seeds. This suppresses solvent-dominated intermediate phases and promotes solvent volatilization. The effective diffusion activation energy increased from 24.5 to 26.9 kJ mol –1, significantly retarding crystal growth. The average cluster growth rate decreased from 320 to 237 nm s –1 . The resulting CsPbI 3- x Br x films exhibit high crystallinity, reduced trap density, and extended carrier lifetime, enabling a power conversion efficiency of 22.14% and improved environmental stability. This work provides direct in situ insights into cluster growth, guiding the use of heterogeneous seeds for high-quality all-inorganic perovskite films.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Perovskite Materials and Applications · TiO2 Photocatalysis and Solar Cells · Machine Learning in Materials Science
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering
Shaanxi Normal University
Key Laboratory of Advanced Molecular Engineering Materials, College of Chemistry and Material Engineering
Baoji University of Arts and Sciences
School of Chemistry and Chemical Engineering
Xi’an University of Architecture and Technology
CNNP Optoelectronics Technology, 2828 Canghai Road, Lingang 201306, P.R. China
Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Dalian Institute of Chemical Physics
Chinese Academy of Sciences Dalian
Center of Materials Science and Optoelectronics Engineering
University of Chinese Academy of Sciences
Funding
Natural Science Basic Research Program of Shaanxi Province · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Shaanxi Normal University · Higher Education Discipline Innovation Project
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