Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 31, Issue 19, Pages 17100-17109Publisher
SPRINGER
DOI: 10.1007/s10854-020-04270-1
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Funding
- Department of Science and Technology (DST)-Science and Engineering Research Board (SERB), Government of India [YSS/2015/000109, CRG/2019/001575]
- DST, Government of India [IFA13-PH-71]
- DST, INSPIRE, Government of India [IF160132]
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CsPbBr(3)has been synthesized via a wet chemical technique instead of colloidal hot injection route. Crystalline structure and chemical composition of the material have been assured by Rietveld refinement and energy dispersive X-ray spectroscopy. Photoresponse capability of CsPbBr(3)nanocrystal in cubic phase has been already explored. Here, intrinsic optoelectronic properties of orthorhombic CsPbBr(3)have been investigated in detail. A prototype photodetector has been fabricated on a transparent conducting oxide-coated glass by using silver as the other electrode material. The photo-responsibility of CsPbBr(3)arises due to the combined effect of electron-hole pair generation and trapping within material and recombination.The non-linearity ofI-Vcharacteristics clearly reveals the formation of well-established Schottky contact at perovskite-ITO junction. Responsivity of the detector increases from 1.4 to 1.73 mA W(-1)after enhancing the irradiance from 25 to 100 mW cm(-2)at 8 V bias voltages. Linear dynamic range has been accounted to study the linear photosensitivity of the device. In order to investigate the stability and reversibility, photocurrent has been measured under ON/OFF condition of frequency 20 s. The quantitative contribution of polycrystalline grain and grain boundary to charge mobilization has been evaluated by fitting the Cole-Cole plot under different solar intensities.
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