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Issue 20, 2020
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Self-driven all-inorganic perovskite microplatelet vertical Schottky junction photodetectors with a tunable spectral response

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Abstract

Wavelength-selective perovskite photodetectors (PDs) have many applications in optoelectronic fields, such as machine vision, imaging and full-color displays. However, the instability of organo–inorganic hybrid perovskite materials severely limits the commercialization of perovskite-based PDs. In this work, more stable all-inorganic perovskites, CsPbBr(3−x)Clx (x = 0, 1, 2, 3) microplatelets (MPs), were used to fabricate Schottky PDs with a simple vertical structure of ITO/MP/Au. The optimized CsPbBr3 MP Schottky PDs exhibit a rapid response speed (75 μs) and a very low dark current (2 pA) at zero bias. Meanwhile, the device shows a high on/off ratio (>106), a large specific detectivity (>1012 Jones) and a linear dynamic range (LDR = 137 dB) with excellent thermal and long-term stability. Furthermore, a tunable spectral response from the ultraviolet to visible range is also demonstrated. These results provide a simple avenue to realize self-driven and spectrally tunable all-inorganic perovskite Schottky PDs with good stability.

Graphical abstract: Self-driven all-inorganic perovskite microplatelet vertical Schottky junction photodetectors with a tunable spectral response

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Supplementary files

Article information


Submitted
23 Mar 2020
Accepted
10 Apr 2020
First published
13 Apr 2020

J. Mater. Chem. C, 2020,8, 6804-6812
Article type
Paper

Self-driven all-inorganic perovskite microplatelet vertical Schottky junction photodetectors with a tunable spectral response

P. Gui, J. Li, X. Zheng, H. Wang, F. Yao, X. Hu, Y. Liu and G. Fang, J. Mater. Chem. C, 2020, 8, 6804
DOI: 10.1039/D0TC01473G

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