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Effect of ultraviolet-ozone treatment of indium-tin-oxide on electrical properties of organic light emitting diodes
- Issue Date
- Mar-2004
- Publisher
- AMER INST PHYSICS
- Citation
- JOURNAL OF APPLIED PHYSICS, v.95, no.5, pp 2560 - 2563
- Pages
- 4
- Journal Title
- JOURNAL OF APPLIED PHYSICS
- Volume
- 95
- Number
- 5
- Start Page
- 2560
- End Page
- 2563
- ISSN
- 0021-8979
1089-7550
- Abstract
- We report the change of surface electronic structure of indium-tin-oxide (ITO) as a function of ultraviolet (UV)-ozone treatment time. The voltage of organic light emitting diodes at a current density of 100 mA/cm(2) was reduced as the surface treatment time using UV-ozone was lengthened. X-ray photoelectron spectroscopy results showed that the relative concentration of carbon atoms decreased, but oxygen concentration increased relatively with UV-ozone treatment. This led to the increase in the ITO work function via the reduction of operation voltage. (C) 2004 American Institute of Physics.
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