Skip navigation
Please use this identifier to cite or link to this item:
Title: Photosensitive dielectric and conductivity relaxation in lead-free cs3bi2cl9 perovskite single crystals
Authors: Satapathi, Soumitra
Tailor N.K.
Published in: Journal of Physical Chemistry C
Abstract: Photosensitive dielectric and conductivity relaxation was observed in all inorganic lead-free Cs3Bi2Cl9 perovskite single crystals. Using impedance and modulus spectroscopy in dark and with subsequent light-on and -off conditions, a reversible shift in modulus peak frequencies was observed. Relevant phenomenological methods based on modified Cole-Cole- and Debyetype relaxation models were applied to analyze the light-sensitive dielectric and conductivity behavior. The detailed analysis of this reversible change in modulus spectra confirms the light-induced trap-assisted reversible dipolar relaxation phenomena in Cs3Bi2Cl9 crystals. The conductivity follows Jonscher's power law, and the value of power "n" was found to be ∼1, which further validates the Debye-type relaxation process. Our study provides an in-depth understanding and new insights into the dielectric and conductivity relaxation mechanism in perovskite single crystals, which motivates the future design of the perovskite single crystal-based energy storage devices. © 2021 American Chemical Society. All rights reserved.
Citation: Journal of Physical Chemistry C, 125(9): 5243-5250
Issue Date: 2021
Publisher: American Chemical Society
Keywords: Cesium compounds
Chlorine compounds
Energy storage
Light sensitive materials
Single crystals
Conductivity relaxation
Debye-type relaxation
Dipolar relaxation
In-depth understanding
Modulus spectroscopy
Peak frequencies
Photosensitive dielectrics
Reversible change
Bismuth compounds
ISSN: 19327447
Author Scopus IDs: 36610769900
Author Affiliations: Satapathi, S., Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
Tailor, N.K., Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
Funding Details: N.K.T. would like to acknowledge the UGC Research Fellowship. S.S. would like to acknowledge the Ministry of Electronics and Information technology DIC-1377-PHY. University Grants Committee, UGC
Corresponding Author: Satapathi, S.; Department of Physics, India; email:
Appears in Collections:Journal Publications [PH]

Files in This Item:
There are no files associated with this item.
Show full item record

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.