Dark Self-Healing-Mediated Negative Photoconductivity of a Lead-Free Cs3Bi2Cl9 Perovskite Single Crystal.

Naveen Kumar Tailor; Partha Maity; Makhsud I. Saidaminov; Narayan Pradhan; Soumitra Satapathi

doi:10.1021/acs.jpclett.1c00057

Dark Self-Healing-Mediated Negative Photoconductivity of a Lead-Free Cs3Bi2Cl9 Perovskite Single Crystal.

Naveen Kumar Tailor, Partha Maity, Makhsud I. Saidaminov, Narayan Pradhan, Soumitra Satapathi

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

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.

Original language	English (US)
Pages (from-to)	2286-2292
Number of pages	7
Journal	The Journal of Physical Chemistry Letters
DOIs	https://doi.org/10.1021/acs.jpclett.1c00057
State	Published - Mar 1 2021

Bibliographical note

KAUST Repository Item: Exported on 2021-03-05
Acknowledgements: N.K.T. acknowledges a UGC Fellowship. S.S. acknowledges the Ministry of Electronics and Information Technology research grant DIC-1377-PHY.

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Materials Science(all)

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10.1021/acs.jpclett.1c00057

https://repository.kaust.edu.sa/bitstream/10754/666897/3/Self-healing%20Manuscript.pdf

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@article{5936c2de12cf4eee9e5b078fe88d2bce,

title = "Dark Self-Healing-Mediated Negative Photoconductivity of a Lead-Free Cs3Bi2Cl9 Perovskite Single Crystal.",

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.",

author = "Tailor, {Naveen Kumar} and Partha Maity and Saidaminov, {Makhsud I.} and Narayan Pradhan and Soumitra Satapathi",

note = "KAUST Repository Item: Exported on 2021-03-05 Acknowledgements: N.K.T. acknowledges a UGC Fellowship. S.S. acknowledges the Ministry of Electronics and Information Technology research grant DIC-1377-PHY.",

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doi = "10.1021/acs.jpclett.1c00057",

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T1 - Dark Self-Healing-Mediated Negative Photoconductivity of a Lead-Free Cs3Bi2Cl9 Perovskite Single Crystal.

AU - Tailor, Naveen Kumar

AU - Maity, Partha

AU - Saidaminov, Makhsud I.

AU - Pradhan, Narayan

AU - Satapathi, Soumitra

N1 - KAUST Repository Item: Exported on 2021-03-05 Acknowledgements: N.K.T. acknowledges a UGC Fellowship. S.S. acknowledges the Ministry of Electronics and Information Technology research grant DIC-1377-PHY.

PY - 2021/3/1

Y1 - 2021/3/1

N2 - 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.

AB - 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.

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UR - https://pubs.acs.org/doi/10.1021/acs.jpclett.1c00057

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M3 - Article

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EP - 2292

JO - The Journal of Physical Chemistry Letters

JF - The Journal of Physical Chemistry Letters

ER -

Dark Self-Healing-Mediated Negative Photoconductivity of a Lead-Free Cs3Bi2Cl9 Perovskite Single Crystal.

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