Self-driven all-inorganic perovskite microplatelet vertical Schottky junction photodetectors with a tunable spectral response
| Autor: | Yongjie Liu, Guojia Fang, Xiaolu Zheng, Pengbin Gui, Jiashuai Li, Xuzhi Hu, Haibing Wang, Fang Yao |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Journal of Materials Chemistry C. 8:6804-6812 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/d0tc01473g |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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