Full near-ultraviolet response photoelectrochemical ultraviolet detector based on TiO2 nanocrystalline coated stainless steel mesh photoanode. (31st August 2021)

• Record Type: Journal Article
• Authors: Wei, Kun; Li, Baoping; Gong, Chengshi; Zhu, Ziran; Zhang, Yu; Liu, Menghan; Ren, Peiling; Pan, Xiaojun; Wang, Youqing; Zhou, Jinyuan
• Is Part Of: Nanotechnology. Volume 32:Number 47(2021)
• Publication Date: 2021-08-31
• Subjects: ultraviolet detector -- titanium dioxide -- photoelectrochemical -- near ultraviolet -- nanocrystalline; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ac1b57
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: In order to solve the 'ultraviolet (UV) filtering problem' caused by traditional sandwich-type structure in photoelectrochemical (PEC) UV detector, we design a special electrode based on stainless steel mesh, which integrates the light absorption layer and the electron collection electrode in a simple way. In combination with an UV-transparent quartz substrate, UV light can directly reach the active material. The improved detector shows good visible-blind, self-powered, and linear response characteristics. The serious recombination caused by metal electrode is suppressed by depositing a barrier layer. The optimized device exhibits a high photoresponse of 0.103 A W −1 at 296 nm, a short recovery time of 250 ms, and very sensitive switching ability. Furthermore, the response range of the detector is expanded from 300 to 400 nm to the full near-UV region. Our work provides an efficient strategy to solve the key problem of the PEC UV detector.