Cross‐Bar SnO2‐NiO Nanofiber‐Array‐Based Transparent Photodetectors with High Detectivity. (22nd November 2019)

• Record Type: Journal Article
• Authors: Long, Zhenghao; Xu, Xiaojie; Yang, Wei; Hu, Mingxiang; Shtansky, Dmitry V.; Golberg, Dmitri; Fang, Xiaosheng
• Is Part Of: Advanced Electronic Materials. Volume 6:Number 1(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-11-22
• Subjects: p‐n junctions -- self‐powered photodetectors -- transparent electronics; Materials -- Electric properties -- Periodicals; Materials science -- Periodicals; Magnetic materials -- Periodicals; Electronic apparatus and appliances -- Periodicals; 537
• DOI: 10.1002/aelm.201901048
• Languages: English
• ISSNs: 2199-160X

Abstract

Abstract: An cross‐bar structure is employed to design a transparent p ‐ n junction‐based photodetector. The device consisting of aligned n ‐SnO2 and p ‐NiO nanofibers is prepared via a mature electrospinning process that is suitable for commercial applications. It exhibits a high detectivity of 2.33 × 10 13 Jones under 250 nm illumination at −5 V, outperforming most state‐of‐art SnO2 ‐based UV photodetectors. It is also endowed with a self‐powered feature due to a photovoltaic effect from the p ‐ n junction, resulting in a photocurrent of 10 −10 A, responsivity of 30.29 mA W −1 at 0 V bias, and detectivity of 2.24 × 10 11 Jones at 0.05 V bias. Moreover, the device is highly transparent (over 90% toward visible light) due to the wide band gap of photoactive materials and well‐designed cross‐bar fiber structure. Additionally, an n‐SnO2 ‐p‐ZnO:Ag (Ag doped ZnO) self‐powered UV photodetector is fabricated that shows good performance and give another example of the use of the cross‐bar structure. Abstract : A transparent, self‐powered ultra‐violet photodetector with a high detectivity of 10 13 Jones is fabricated. It is based on cross‐bar n‐SnO2 ‐p‐NiO nanofiber arrays synthesized by a simple electrospinning method. The fabric‐like device also exhibits an outstanding responsivity. Furthermore, another high‐performance photodetector based on cross bar SnO2 and Ag‐doped ZnO nanofiber arrays is fabricated.