cis/trans-Isomeric Cation Tuning Photoluminescence and Photodetection in 2D Perovskites

Cationic components in the organic–inorganic hybrid perovskites (OIHPs) play an important role in the arrangement and tilting of the inorganic part that is responsible for semiconducting, luminescent, and photoelectronic properties. Herein, we report two 2D OIHP compounds, (cis-4ACHO)2(H3OBr)­PbBr4...

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Bibliographic Details
Published in:The journal of physical chemistry letters 2022-05, Vol.13 (18), p.4119-4124
Main Authors: Han, Xiang-Bin, Zu, Hui-Yuan, Chai, Chao-Yang, Liang, Bei-Dou, Fan, Chang-Chun, Zhang, Wen
Format: Article
Language:English
Subjects:
Physical Insights into Materials and Molecular Properties
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Summary:Cationic components in the organic–inorganic hybrid perovskites (OIHPs) play an important role in the arrangement and tilting of the inorganic part that is responsible for semiconducting, luminescent, and photoelectronic properties. Herein, we report two 2D OIHP compounds, (cis-4ACHO)2(H3OBr)­PbBr4 (1) and (trans-4ACHO)2(H3OCl)­PbBr4 (2) (4ACHO = 4-aminocyclohexanol), showing both photoluminescence (PL) and photodetection (PD) that are tuned by the cis- and trans configurational isomerism of 4ACHO. Crystals of 1 and 2 exhibit similar packing structures but with different crystallographic symmetries. Compound 2 displays a broadband white-light emission with a higher PL efficiency (6.6%) than 1 (2.1%) that emits narrowband blue light while the PD property of 1 is better than 2 with a higher on/off ratio under the same conditions. The PL and PD of the two compounds show a seesaw relationship, which provides a new perspective for understanding the PL and PD properties in OIHPs.
ISSN:1948-7185
1948-7185
DOI:10.1021/acs.jpclett.2c00714