卤化物
钙钛矿(结构)
材料科学
晶界
MXenes公司
带隙
结晶学
化学工程
光电子学
纳米技术
化学
无机化学
复合材料
微观结构
工程类
作者
Xiuxiu Yao,Jialong Duan,Yuanyuan Zhao,Junshuai Zhang,Qiyao Guo,Qiaoyu Zhang,Xiya Yang,Yanyan Duan,Peizhi Yang,Qunwei Tang
摘要
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 Ti 3 C 2 T x 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 CsPbIBr 2 and CsPbI 2 Br 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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