Establishing a Relationship between the Bandgap and the Structure in 2D Lead Halide Perovskite Semiconductors

钙钛矿(结构) 带隙 卤化物 半导体 光致发光 材料科学 光探测 光电子学 结晶学 纳米技术 化学 无机化学 光电探测器
作者
Hui-Yuan Zu,Chang‐Chun Fan,Chengdong Liu,Chang‐Qing Jing,Chao‐Yang Chai,Bei‐Dou Liang,Xiang‐Bin Han,Wen Zhang
出处
期刊:Chemistry of Materials [American Chemical Society]
卷期号:35 (15): 5854-5863 被引量:9
标识
DOI:10.1021/acs.chemmater.3c00596
摘要

Hybrid lead halide perovskites have been intensively investigated due to their structural diversity and outstanding optoelectronic properties. As emerging semiconducting materials, their bandgaps play a key role in regulating the performance. Qualitative correlations between the bandgap and structure have been uncovered; however, quantified relationships have not yet been established. Herein, we report a series of hydrogen-bonded quasi-Dion–Jacobson (DJ) perovskite semiconductors, [(HOOCnH2n–2NH3)2]PbBr4 (n = 3–8), as a model system to set up a more clear relationship between the structural distortions and optoelectronic properties. When the n ranges from 4 to 8, the serial compounds are featured by distinctive hydrogen-bonded diammonium layers containing dimerized COOH linkers and balanced photoluminescent and photodetection properties. A linear relationship between the bandgap (Eg) and two structural parameters (Dint and Dd) is set up, that is, Eg = 2.694 + 0.004680Dint + 0.3109Dd, indicating the roles of both the interlayer distance and inorganic framework distortion. This work not only expands the typical DJ-type perovskites but also provides a deepened understanding of the relationship between the structures and optoelectronic properties.
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