UV illumination effects on electrical characteristics of metal-polymer-semiconductor diodes fabricated with new poly(propylene glycol)-b-polystyrene block copolymer
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Date
2014
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Sci Ltd
Access Rights
info:eu-repo/semantics/closedAccess
Abstract
Au/poly(propylene glycol)-b-polystyrene/n-Si (D1) and Au/poly(propylene glycol)-b-polystyrene(HAuCl4 dispersed)/n-Si (02) diodes were fabricated and their response to UV illumination was investigated using current-voltage measurements in dark and under various illumination intensities (50-250 mW/cm(2)). Scanning Electron Microscope micrographs of the diodes were provided for morphological analysis. Main electrical parameters; such as ideality factor, barrier height and reverse saturation current, are calculated using Thermionic Emission and Norde's method, and it was found that they show dependence on UV illumination. Ideality factor values of D1 and D2 diodes in dark is 2.53 and 2.29 whereas they are 3.37 and 3.39 under 100 mW/cm(2) UV illumination, respectively. A noticeable effect of UV illumination is the considerable increase of current in the reverse bias region compared with current in dark such that current value increases by similar to 10(3) times with 100 mW/cm(2) UV illumination for both diodes. Furthermore, density distribution profiles of surface states in these diodes were also investigated. (C) 2013 Elsevier Ltd. All rights reserved.
Description
Gokcen, Muharrem/0000-0001-9063-3028; YILDIRIM, Mert/0000-0002-8526-1802
WOS: 000328801200002
WOS: 000328801200002
Keywords
Fibres, Layered structures, Electrical properties, Electron microscopy, Interface states
Journal or Series
Composites Part B-Engineering
WoS Q Value
Q1
Scopus Q Value
Q1
Volume
57
