Please use this identifier to cite or link to this item: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/7649
Title: Combining π-Conjugation and Cation−π Interaction for Water-Stable and Photoconductive One-Dimensional Hybrid Lead Bromide
Authors: SHEIKH, TARIQ
ANILKUMAR, GOKUL M.
Das, Tisita
RAHMAN, ATIKUR
Chakraborty, Sudip
NAG, ANGSHUMAN
Dept. of Chemistry
Dept. of Physics
Keywords: Cations
Crystal structure
Electrical conductivity
Perovskites
Photonics
2023-MAR-WEEK1
TOC-MAR-2023
2023
Issue Date: Feb-2023
Publisher: American Chemical Society
Citation: Journal of Physical Chemistry Letters, 14(7), 1870–1876.
Abstract: Hybrid lead halide perovskites and their derivatives are important optoelectronic materials but suffer from water instability. Combining both the optoelectronics and the water stability of such systems is a major challenge in material design today. To address this issue, we employ the well-known π-conjugation and cation−π interaction concepts in designing a hybrid lead halide perovskite derivative system. (4,4′-VDP)Pb2Br6 (VDP = vinylenedipyridinium) single crystals are prepared. They have a one-dimensional (1D) arrangement of inorganic Pb–Br sublattices connected via the 4,4′-VDP organic sublattice. The π-conjugation in the 4,4′-VDP sublattice allows electronic communication between the 1D Pb–Br units, reducing the band gap and improving the photoconductivity. Importantly, N+ of one 4,4′-VDP molecular ion interacts with the π-electron cloud of the adjacent one. This intermolecular cation−π interaction extends throughout the organic sublattice, making the hybrid crystal stable when stored under water for more than a year without requiring any encapsulations.
URI: https://doi.org/10.1021/acs.jpclett.2c03861
http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/7649
ISSN: 1948-7185
Appears in Collections:JOURNAL ARTICLES

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