Synergetic Enhancement in Photosensitivity and Flexibility of Photodetectors Based on Hybrid Nanobelt Network

Abstract

AbstractHigh photosensitivity, transparency, flexibility, and facile assembly are the main important features of photodetectors, which extend their use for vast range of applications. In this study, a highly stable transparent flexible ultraviolet–visible (UV–vis) hybrid photodetectors, with enhanced photosensitivity and fast photoresponse speed (on/off switching) based on In2O3‐ZnO hybrid nanobelts, is reported. A highly enhanced photosensitivity of about 4.7 × 105, fast photoresponse, and at the same time extended spectral range (UV to vis) have been achieved in these hybrid flexible photodetectors as compared to their pure counterparts In2O3 and ZnO. Furthermore, these photodetectors have shown excellent photoresponsivity of 18.5 A W−1 with an external quantum efficiency 7.4 × 103% and a high detectivity of 1.7 × 1012 Jones under the excitation wavelength of 308 nm. A facile, tunable, and cost‐effective method has been employed to assemble these photodetectors by using well‐aligned electrospun nanobelts. The prepared UV–vis photodetectors have shown a high transparency >90% under visible light (400–700 nm) which demonstrates their applications in fully light exposure required devices. These transparent electrospun nanobelts with high aspect ratios can also be transferred to multiple substrates, which shows their applications in different environment as a freestanding nanobelt network for UV–vis photodetectors.