journal article·2023-11Open access

Grain Boundary Elimination via Recrystallization‐Assisted Vapor Deposition for Efficient and Stable Perovskite Solar Cells and Modules

Yulong Wang, Pin Lv, Junye Pan, Jiahui Chen, Xinjie Liu, Min Hu, Li Wan, Kun Cao, Baoshun Liu, Zhiliang Ku, Yi‐Bing Cheng, Jianfeng Lu

Advanced Materials· Volume 35· Issue 44

Abstract

Abstract Vapor deposition is a promising technology for the mass production of perovskite solar cells. However, the efficiencies of solar cells and modules based on vapor‐deposited perovskites are significantly lower than those fabricated using the solution method. Emerging evidence suggests that large defects are generated during vapor deposition owing to a specific top‐down crystallization mechanism. Herein, a hybrid vapor deposition method combined with solvent‐assisted recrystallization for fabricating high‐quality large‐area perovskite films with low defect densities is presented. It is demonstrated that an intermediate phase can be formed at the grain boundaries, which induces the secondary growth of small grains into large ones. Consequently, perovskite films with substantially reduced grain boundaries and defect densities are fabricated. Results of temperature‐dependent charge‐carrier dynamics show that the proposed method successfully suppresses all recombination reactions. Champion efficiencies of 21.9% for small‐area (0.16 cm 2 ) cells and 19.9% for large‐area (10.0 cm 2 ) solar modules under AM 1.5 G irradiation are achieved. Moreover, the modules exhibit high operational stability, i.e., they retain >92% of their initial efficiencies after 200 h of continuous operation.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties

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

Affiliations

State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 China

School of Electronic and Electrical Engineering Hubei Province Engineering Research Center for Intelligent Micro‐Nano Medical Equipment and Key Technologies Wuhan Textile University Wuhan 430200 China

Key Laboratory for the Green Preparation and Application of Functional Materials Ministry of Education Hubei Key Laboratory of Polymer Materials Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Faculty of Materials Science and Engineering Hubei University Wuhan 430062 China

State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM) Nanjing University of Posts & Telecommunications Nanjing 210023 China

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528216 China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Hubei Province · State Key Laboratory of Silicate Materials for Architectures

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