journal article·2023-12Open access

Stretchable alkenamides terminated Ti3C2Tx MXenes to release strain for lattice‐stable mixed‐halide perovskite solar cells with suppressed halide segregation

Xuemei Yao, Jialong Duan, Yuanyuan Zhao, Junshuai Zhang, Qiyao Guo, Qiaoyu Zhang, Xiya Yang, Yanyan Duan, Peizhi Yang, Qunwei Tang

Carbon Energy· Volume 5· Issue 12

Abstract

Abstract Bandgap‐tunable mixed‐halide perovskite materials have attracted considerable interest because of their indispensability as top counterparts in tandem solar cells. However, the soft and disordered lattice always suffers from severe phase segregation under illumination, which is particularly susceptible to residual lattice strain. Herein, we report a strain regulation strategy by using alkenamides terminated Ti3C2Tx MXenes as an additive into perovskite precursor. Apart from the role of a template for grain growth to obtain high‐quality films, the stretchable alkyl chain promotes lattice shrinkage or expansion to form an elastic grain boundary to eliminate the spatially distributed stain and shut down ion migration channels. As a result, the all‐inorganic perovskite solar cells based on CsPbIBr2 and CsPbI2Br halides achieve prolonged device stability under harsh conditions and the best power conversion efficiencies up to 11.06% and 14.30%, respectively.
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Research context

OpenAlex topics: Perovskite Materials and Applications · MXene and MAX Phase Materials · 2D Materials and Applications

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

Affiliations

Institute of Carbon Neutrality, College of Chemical and Biological Engineering Shandong University of Science and Technology Qingdao Shandong China

Key Laboratory of Advanced Technique and Preparation for Renewable Energy Materials, Ministry of Education Yunnan Normal University Kunming Yunnan China

College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao Shandong China

College of Information Science and Technology Jinan University Guangzhou Guangdong China

School of Materials Science and Engineering, State Centre for International Cooperation on Designer Low‐Carbon and Environmental Material (SCICDLCEM) Zhengzhou University Zhengzhou Henan China

Funding

National Natural Science Foundation of China

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