Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5365278 | Applied Surface Science | 2007 | 5 Pages |
Abstract
Indium-tin oxide (ITO) films deposited on heated and non-heated glass substrates by a pulsed Nd:YAG laser at 355 nm and â¼2.5 J/cm2 were used in the fabrication of simple organic light-emitting diodes (OLEDs), ITO/(PVK + Alq3 + TPD)/Al. The ITO was deposited on heated glass substrates which possessed resistivity as low as â¼3 Ã 10â4 Ω cm, optical transmission as high as â¼92% and carrier concentration of about â¼5 Ã 1020 cmâ3, were comparable to the commercial ITO. Substrate heating transformed the ITO microstructure from amorphous to polycrystalline, as revealed by the XRD spectrum. While the polycrystalline ITO produced higher OLED brightness, it was still lower than that on the commercial ITO due to surface roughness. A DLC layer of â¼1.5 nm deposited on this ITO at laser fluence of >12.5 J/cm2 improved its device brightness by suppressing the surface roughness effect.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
T.K. Yong, S.S. Yap, György Sáfrán, T.Y. Tou,