A self-powered ultraviolet photodetector based on TiO2/Ag/ZnS nanotubes with high stability and fast response. Issue 4 (20th December 2019)

• Record Type: Journal Article
• Authors: Li, Xiang; Gao, Shiyong; Wang, Guangning; Xu, Zhikun; Jiao, Shujie; Wang, Dongjun; Huang, Yuewu; Sang, Dandan; Wang, Jinzhong; Zhang, Yong
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 4(2019)
• Page Start: 1353
• Page End: 1358
• Publication Date: 2019-12-20
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9tc05326c
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Ag nanoparticles were deposited onto TiO2 nanotubes and a ZnS layer was further fabricated on the surface of the TiO2 /Ag nanotubes at room temperature to form a self-powered UV photodetector. Abstract : Ag nanoparticles (NPs) have been successfully deposited onto TiO2 nanotubes (NTs) via a photochemical method and ZnS layer was further fabricated on the surface of the TiO2 /Ag NTs at room temperature. The morphology, composition and structure of the as-prepared samples were analyzed. A self-powered UV photodetector (UVPD) based on the TiO2 /Ag/ZnS NTs has been constructed. When exposed to UV light, the TiO2 /Ag/ZnS NTs UVPD manifests a higher photocurrent density than that of the TiO2 and TiO2 /Ag NTs UVPDs at a bias of zero V. The TiO2 /Ag/ZnS NTs UVPD also reveals a splendid linear optical signal response. Meanwhile, it is noteworthy that the TiO2 /Ag/ZnS NTs UVPD has excellent stability and repeatability, and the rise time and decay time are 0.16 s and 0.18 s, respectively. Moreover, a possible UV detection mechanism of the TiO2 /Ag/ZnS NTs UVPD is proposed.