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An Organic–Inorganic Perovskitoid with Zwitterion Cysteamine Linker and its Crystal–Crystal Transformation to Ruddlesden‐Popper Phase
Author(s) -
Kour Prachi,
Chenna Reddy Mallu,
Pal Shiv,
Sidhik Siraj,
Das Tisita,
Pandey Padmini,
Mukherjee Shatabdi Porel,
Chakraborty Sudip,
Mohite Aditya D.,
Ogale Satishchandra
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202105918
Subject(s) - zwitterion , photoluminescence , crystal (programming language) , perovskite (structure) , materials science , crystallography , crystal structure , phase (matter) , halide , chemistry , optoelectronics , inorganic chemistry , molecule , organic chemistry , computer science , programming language
We demonstrate synthesis of a new low‐D hybrid perovskitoid (a perovskite‐like hybrid halide structure, yellow crystals, P 21/ n space group) using zwitterion cysteamine (2‐aminoethanethiol) linker, and its remarkable molecular diffusion‐controlled crystal‐to‐crystal transformation to Ruddlesden‐Popper phase (Red crystals, Pnma space group). Our stable intermediate perovskitoid distinctly differs from all previous reports by way of a unique staggered arrangement of holes in the puckered 2D configuration with a face‐sharing connection between the corrugated‐1D double chains. The PL intensity for the yellow phase is 5 orders higher as compared to the red phase and the corresponding average lifetime is also fairly long (143 ns). First principles DFT calculations conform very well with the experimental band gap data. We demonstrate applicability of the new perovskitoid yellow phase as an excellent active layer in a self‐powered photodetector and for selective detection of Ni 2+ via On‐Off‐On photoluminescence (PL) based on its composite with few‐layer black phosphorous.