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

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 approximate to 2.14 x 10(16) Jones (1 Jones = 1 cm Hz(1/2) W-1), the high responsivity of approximate to 7.07 x 10(4) mA W-1, the prominent sensitivity of approximate to 2.08 x 10(12) cm(2) 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.