Authors

Department of Physics and Astrophysics, University of Delhi, New Delhi, 110007,india

Abstract

Ultraviolet (UV) light detection characteristics with sputtered ZnO films deposited on paper with graphite pencil drawn conducting inter-digital electrodes on normal paper have been investigated. Structural, electrical and microstructural properties of ZnO films grown by magnetron sputtering technique at under differentsputtering pressures have been evaluated forultraviolet (UV) light detection. Different types of paper used as substrate material, and the influence of their surface microstructure on the growth of ZnO film quality is examined.Films deposited on the fibrous paper are found to be polycrystalline, whereas the same films on dense glass substrates promote a c-axis oriented growth. The nucleation of sputtered ZnO films on paper is found to occur along the fine fibers of the paper and vary with sputtering pressure. Films grown at higher sputtering pressures (30 to 40 mTorr) in Ar/O2=50:50 are found to yield dense deposits. Pencil drawn interdigital electrode structures on paper overlaid with 0.25 μm thick ZnO films exhibit reproducible photo response to ultraviole(UV) light (= 365 nm), with low dark current. It’simportant for low prize and easy fabrication of optoelectronic foldabldevices.Copyright © 2017VBRI Press

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