Flexible ultraviolet photodetectors with ZnO nanowire networks fabricated by large area controlled roll-to-roll processing?

Journal of Materials Chemistry C Pub Date: 2016-08-10 DOI: 10.1039/C6TC02371A

Abstract

Ultraviolet (UV) photodetectors containing flexible films were fabricated by a roll-to-roll processing method. Gravure printing and slot-die coating techniques were utilized for manufacturing Ag sensing electrodes and Zn acetate seeds, respectively, while well-organized Zn oxide nanowire networks with a high density were grown hydrothermally on flexible substrates. The maximum photocurrent of 62.1 μA, a response time of 9.1 s, and a recovery time of 56 s were obtained at a bias voltage of 10 V under UV irradiation with a density of 127 μW cm?2. The resulting correlation between the seeding rate, the nanowire diameter, and the photocurrent indicates that high seeding rates lead to the formation of dense nanowire structures and excellent response times.

Graphical abstract: Flexible ultraviolet photodetectors with ZnO nanowire networks fabricated by large area controlled roll-to-roll processing
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