Heterostructured TiO2/MgO nanowire arrays for self-powered UV photodetectors. Issue 89 (9th September 2016)

• Record Type: Journal Article
• Authors: Ni, Shiming; Yu, Qingjiang; Huang, Yuewu; Wang, Jianan; Li, Lin; Yu, Cuiling; Guo, Fengyun; Wu, Haigang; Lu, Weijie; Zhang, Xitian
• Is Part Of: RSC advances. Volume 6:Issue 89(2016)
• Page Start: 85951
• Page End: 85957
• Publication Date: 2016-09-09
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra18150c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A heterostructured TiO2 /MgO NWAs based UVPD exhibits a high responsivity and fast response, together with excellent spectral selectivity. Abstract : Heterostructured TiO2 /MgO nanowire arrays (NWAs) were grown vertically on fluorine-doped tin oxide (FTO) glass by a simple solvothermal method. A photoelectrochemical self-powered UV photodetector (UVPD) was fabricated using the heterostructured TiO2 /MgO nanowire arrays (NWAs) as the photoanode. The TiO2 /MgO NWAs based UVPDs shows a higher photocurrent density ( J ) and open-circuit voltage ( V oc ) with respect to the UVPD with bare TiO2 NWAs under UV light irradiance. The intrinsic role of the MgO shell layer on the J and V oc varitions of UVPDs is investigated in detail. An impressive responsivity of 0.233 A W −1 was achieved for the UVPD with TiO2 /MgO NWAs, which is the highest responsivity for photoelectrochemical self-powered UVPDs based on various TiO2 nanostructured photoanodes so far. Moreover, this UVPD also exhibits a high on/off ratio, fast response time, excellent visible-blind characteristic and linear optical signal response.