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A ZIF-8@H:ZnO core–shell nanorod arrays/Si heterojunction self-powered photodetector with ultrahigh performance

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Abstract

Native defects can degrade the performance and stability of an optoelectric device. Herein, a zeolitic imidazolate framework-8 (ZIF-8)@H:ZnO core–shell nanorod arrays/Si heterojunction self-powered photodetector is demonstrated. Via the combined process of hydrogenation and ZIF-8 passivation, the photoresponsive characteristics of this photodetector could be significantly enhanced; the photodetector exhibited the superior detectivity of ∼2.14 × 1016 Jones (1 Jones = 1 cm Hz1/2 W−1), the high responsivity of ∼7.07 × 104 mA W−1, the prominent sensitivity of ∼2.08 × 1012 cm2 W−1 and broadband photodetection in the region ranging from ultraviolet to near infrared. As a critical figure of merit, its responsivity increased by nearly 5 orders of magnitude than that of the pristine ZnO nanorod arrays/Si heterojunction photodetector. More importantly, the comprehensive performance of the ZIF-8@H:ZnO core–shell nanorod arrays/Si heterojunction photodetector was significantly higher than that of ZnO-based photodetectors reported to date, and it was comparable to those of two-dimensional (2D) materials, zero-dimensional (0D) materials, topological insulators, perovskites and other oxide-based self-powered photodetectors. This novel post-treatment strategy has significant potential for application in the development of high-performance self-powered photodetectors. Moreover, this study may be extended to other oxide-based optoelectronic devices.

Graphical abstract: A ZIF-8@H:ZnO core–shell nanorod arrays/Si heterojunction self-powered photodetector with ultrahigh performance

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Publication details

The article was received on 16 Jan 2019, accepted on 27 Mar 2019 and first published on 28 Mar 2019


Article type: Paper
DOI: 10.1039/C9TC00290A
Citation: J. Mater. Chem. C, 2019, Advance Article

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    A ZIF-8@H:ZnO core–shell nanorod arrays/Si heterojunction self-powered photodetector with ultrahigh performance

    T. Guo, C. Ling, X. Li, X. Qiao, X. Li, Y. Yin, Y. Xiong, L. Zhu, K. Yan and Q. Xue, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C9TC00290A

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