Issue 4, 2022

2D Hybrid perovskite incorporating cage-confined secondary ammonium cations toward effective photodetection

Abstract

By confining the secondary dimethylammonium (DMA) cation in a distorted perovskite cavity, we assembled a new 2D Ruddlesden–Popper metal halide perovskite of (i-BA)2(DMA)Pb2Br7 (i-BA = n-isobutylammonium), in which the DMA cation templates its inorganic perovskite framework and the quantum-well motif renders a fascinating photoresponse. Crystal-based planar arrays exhibit effective photodetection behaviors, including a notable detectivity (∼5.6 × 1012 Jones), a high responsivity (∼1.25 A W−1) and a large switching ratio (∼1.5 × 103). These properties result from its low dark current restricted to the hopping barrier of the insulated organic bilayer and a strong in-plane photoresponse correlated with the perovskite network. This work throws light on the targeted exploration of photosensitive candidates in the family of organic–inorganic hybrid perovskites, as well as high-performance devices.

Graphical abstract: 2D Hybrid perovskite incorporating cage-confined secondary ammonium cations toward effective photodetection

Supplementary files

Article information

Article type
Communication
Submitted
09 Okt. 2021
Accepted
01 Dec. 2021
First published
02 Dec. 2021

Chem. Commun., 2022,58, 561-564

2D Hybrid perovskite incorporating cage-confined secondary ammonium cations toward effective photodetection

L. Hua, H. Chen, S. Han, H. Xu, L. Lu, L. Tang, B. Wang, J. Luo and Z. Sun, Chem. Commun., 2022, 58, 561 DOI: 10.1039/D1CC05705G

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