Highly flexible indium zinc oxide electrode grown on PET substrate by cost efficient roll-to-roll sputtering process

Title
Highly flexible indium zinc oxide electrode grown on PET substrate by cost efficient roll-to-roll sputtering process
Authors
박용석김한기정순욱조운조
Keywords
transparency; sheet resistance; flexibility; Indium zinc oxide (IZO); Roll-to-roll sputter; Transparency
Issue Date
2010-03
Publisher
Thin solid films
Citation
VOL 518, NO 11, 3071-3074
Abstract
We have investigated the characteristics of flexible indium zinc oxide (IZO) electrode grown on polyethylene terephthalate (PET) substrates using a specially designed roll-to-roll (RTR) sputtering system for use in flexible optoelectronics. It was found that both electrical and optical properties of the flexible IZO electrode were critically dependent on the DC power and Ar/O2 flow ratio during the roll-to-roll sputtering process. At optimized conditions (constant working pressure of 3 mTorr, Ar/O2 flow ratio of Ar at only 30 sccm, DC power 800W and rolling speed at 0.1 cm/s) the flexible IZO electrode exhibits a sheet resistance of 17.25Ω/sq and an optical transmittance of 89.45% at 550 nm wavelength. Due to the low PET substrate temperature, which is effectively maintained by cooling drum system, all IZO electrodes showed an amorphous structure regardless of the DC power and Ar/O2 flow ratio. Furthermore, the IZO electrodes grown at optimized condition exhibited superior flexibility than the conventional amorphous ITO electrodes due to its stable amorphous structure. This indicates that the RTR sputter grown IZO electrode is a promising flexible electrode that can substitute for the conventional ITO electrode, due to its low resistance, high transparency, superior flexibility and fast preparation by the RTR process.
URI
http://pubs.kist.re.kr/handle/201004/38382
ISSN
0040-6090
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE