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Issue 19, 2018
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All-inorganic perovskite CsPbBr3-based self-powered light-emitting photodetectors with ZnO hollow balls as an ultraviolet response center

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Abstract

Self-powered light-emitting photodetectors (SLEPs) can simultaneously transmit and receive information using light, offering huge potential for applications in interactive communication systems. However, high-performance SLEPs are very hard to achieve due to the seriously contradictory principles of carrier transport in SLEPs. In this study, a novel structure based on a ZnO hollow ball/CsPbBr3 heterojunction, in which ZnO hollow balls function as an ultraviolet (UV) response center and CsPbBr3 is designed to be a green light-emitting material, is reported as a high-performance SLEP. Since the ZnO hollow balls have superior light trapping characteristics for UV light, the device shows a huge UV response with the on/off ratio and detectivity up to 16 527 and 2.4 × 1013 Jones, respectively. Moreover, it displays blue emission with a low threshold voltage because of CsPbBr3. Compared with the traditional ZnO/GaN structure devices, the device showed enhanced dual-functional performance at various wavelengths due to the insertion of CsPbBr3, which resulted in a better contact interface and green-light emission center. Our structure separating the light-responsive and emitting active regions avoids the contradictory principles of carrier transport, which may provide new access to gain high-performance dual-functional devices.

Graphical abstract: All-inorganic perovskite CsPbBr3-based self-powered light-emitting photodetectors with ZnO hollow balls as an ultraviolet response center

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Publication details

The article was received on 26 Feb 2018, accepted on 11 Apr 2018 and first published on 17 Apr 2018


Article type: Communication
DOI: 10.1039/C8TC00978C
Citation: J. Mater. Chem. C, 2018,6, 5113-5121
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    All-inorganic perovskite CsPbBr3-based self-powered light-emitting photodetectors with ZnO hollow balls as an ultraviolet response center

    Z. Song, H. Zhou, P. Gui, X. Yang, R. Liu, G. Ma, H. Wang and G. Fang, J. Mater. Chem. C, 2018, 6, 5113
    DOI: 10.1039/C8TC00978C

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