Enhanced Performance of a Self‐Powered ZnO Photodetector by Coupling LSPR‐Inspired Pyro‐Phototronic Effect and Piezo‐Phototronic Effect. Issue 7 (30th January 2022)

• Record Type: Journal Article
• Authors: Li, Qi; Huang, Jing; Meng, Jianping; Li, Zhou
• Is Part Of: Advanced optical materials. Volume 10:Issue 7(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-01-30
• Subjects: core‐shell ZnO/CuO -- localized surface plasmon resonance -- photodetectors -- piezo‐phototronic effect -- pyro‐phototronic effect -- self‐powered devices; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.202102468
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: Ultraviolet detection is overriding priority in many military and civilian fields. A photodetector can be effectively enhanced by introducing piezo‐phototronic effect, pyro‐phototronic effect, and localized surface plasmon resonance (LSPR). Coupling piezo‐phototronic, pyro‐phototronic, and LSPR effect can be realized in a self‐powered photodetector based on ZnO/CuO nanorods covered with Au nanoparticles (NPs). The influences of LSPR, pyroelectric and external pressure on the performance of devices are thoroughly investigated, respectively. ZnO/CuO/Au devices display the most attractive performance under pressure of 73.7 N. The maxima of responsivity and detectivity are obtained as 0.81 mA W ‐1 and 3.3 × 10 13 Jones, respectively, under pressure of 73.7 N when detecting weak ultraviolet radiation (140 nW cm ‐2 ). Responsivity and detectivity are dramatically enhanced by 17× and 12× compared to CuO/ZnO devices. Moreover, rise time and fall time reduce from 114/75 ms of a ZnO/CuO device to 18/12 ms of a ZnO/CuO/Au device under pressure of 64.7 N. These results demonstrate that LSPR, pyro‐phototronic, and piezo‐phototronic coupled effect makes greater improvement than the individual effects in the performance of photodetectors. This work probably can be a cornerstone of designing high‐performance photodetectors using other nanomaterial systems as well. Abstract : A self‐powered, high‐performance photodetector based on CuO‐ZnO p‐n junction is fabricated by coupling piezo‐phototronic effect and pyro‐phototronic effect inspired by localized surface plasmon resonance (LSPR). The photodetector exhibits high responsivity and fast photoresponse to UV light. This work provides an unconventional strategy to develop high‐performance photodetector by coupling LSPR‐inspired pyro‐phototronic and piezo‐phototronic effect.