Skip navigation
Please use this identifier to cite or link to this item:
Title: Dark Self-Healing-Mediated Negative Photoconductivity of a Lead-Free Cs3Bi2Cl9Perovskite Single Crystal
Authors: Tailor N.K.
Maity P.
Saidaminov M.I.
Pradhan N.
Satapathi, Soumitra
Published in: Journal of Physical Chemistry Letters
Abstract: Recently, halide perovskites have emerged as a promising material for device applications. Lead-based perovskites have been widely explored, while investigation of the optical properties of lead-free perovskites remains limited. Lead-halide perovskite single crystals have shown light-induced positive photoconductivity, and as lead-free perovskites are optically active, they are expected to demonstrate similar properties. However, we report here light-induced negative photoconductivity with slow recovery in lead-free Cs3Bi2Cl9 perovskite. Femtosecond transient reflectance (fs-TR) spectroscopy studies further reveal that these electronic transport properties are due to the formation of light-activated metastable trap states within the perovskite crystal. The figure of merits were calculated for Cs3Bi2Cl9 single-crystal detectors, including responsivity (17 mA/W), detectivity (6.23 × 1011 Jones), and the ratio of current in dark to light (∼7160). These observations for Cs3Bi2Cl9 single crystals, which were optically active but showed retroactive photocurrent on irradiation, remain unique for such materials. ©
Citation: Journal of Physical Chemistry Letters, 12(9): 2286-2292
Issue Date: 2021
Publisher: American Chemical Society
Keywords: Bismuth compounds
Chlorine compounds
Optical properties
Self-healing materials
Single crystals
Device application
Electronic transport properties
Femtosecond transient
Figure of merits
Halide perovskites
Lead-free perovskites
Optically Active
Perovskite crystal
Lead compounds
ISSN: 19487185
Author Scopus IDs: 57211634045
Author Affiliations: Tailor, N.K., Department of Physics, Indian Institute of Technology Roorkee, Haridwar, Roorkee, Uttarakhand, 247667, India
Maity, P., Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
Saidaminov, M.I., Department of Chemistry, University of Victoria, Victoria, BC V8W 2Y2, Canada
Pradhan, N., Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata, 700032, India
Satapathi, S., Department of Physics, Indian Institute of Technology Roorkee, Haridwar, Roorkee, Uttarakhand, 247667, India
Funding Details: N.K.T. acknowledges a UGC Fellowship. S.S. acknowledges the Ministry of Electronics and Information Technology research grant DIC-1377-PHY. University Grants Committee, UGC; Ministry of Electronics and Information technology, Meity: DIC-1377-PHY
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.