Effects of aquaregia treatment of indium{endash}tin{endash}oxide substrates on the behavior of double layered organic light-emitting diodes
- Ames Laboratory--USDOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)
- Department of Physics and Materials Research Center, University of Puerto Rico, Rio Piedras, Puerto Rico 00931 (United States)
The effects of a controlled aquaregia treatment of indium{endash}tin{endash}oxide (ITO) substrates on the behavior of highly efficient vacuum evaporated double layered 8-tris-hydroxyquinoline Al (Alq{sub 3})-based light-emitting diodes are described. It is found that in suitably treated devices, both current injection and the electroluminescence (EL) are significantly enhanced. The enhancement is believed to result from the greater ITO/hole transporting layer contact areas and the contact conditions. The observed dependence of I(V), the EL output, and the EL efficiency on the ITO surface morphology indicates that space-charge-limited currents dominate the behavior of the devices. {copyright} {ital 1997 American Institute of Physics.}
- Research Organization:
- Ames National Laboratory
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 496371
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 20 Vol. 70; ISSN 0003-6951; ISSN APPLAB
- Country of Publication:
- United States
- Language:
- English
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