title: Ultraviolet photodetection of flexible ZnO nanowire sheets in polydimethylsiloxane polymer.
abstract: ZnO nanowires are normally exposed to an oxygen atmosphere to achieve high performance in UV photodetection. In this work we present results on a UV photodetector fabricated using a flexible ZnO nanowire sheet embedded in polydimethylsiloxane (PDMS), a gas-permeable polymer, showing reproducible UV photoresponse and enhanced photoconduction. PDMS coating results in a reduced response speed compared to that of a ZnO nanowire film in air. The rising speed is slightly reduced, while the decay time is prolonged by about a factor of four. We conclude that oxygen molecules diffusing in PDMS are responsible for the UV photoresponse.
authors.affiliation: School of Chemistry, Physics & Mechanical Engineering, Queensland University of Technology, Brisbane, 4001, Australia.
authors.forename: Jinzhang
authors.initials: J
authors.lastname: Liu
authors.forename: Nunzio
authors.initials: N
authors.lastname: Motta
authors.forename: Soonil
authors.initials: S
authors.lastname: Lee