Self-driven all-inorganic perovskite microplatelet vertical Schottky junction photodetectors with a tunable spectral response. Issue 20 (22nd April 2020)

• Record Type: Journal Article
• Authors: Gui, Pengbin; Li, Jiashuai; Zheng, Xiaolu; Wang, Haibing; Yao, Fang; Hu, Xuzhi; Liu, Yongjie; Fang, Guojia
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 20(2020)
• Page Start: 6804
• Page End: 6812
• Publication Date: 2020-04-22
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0tc01473g
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : An all-inorganic perovskite self-driven vertical Schottky junction photodetector with a tunable spectral response is reported. 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 ) Cl x ( 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 (>10 6 ), a large specific detectivity (>10 12 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.