Journal
THIN SOLID FILMS
Volume 498, Issue 1-2, Pages 240-243Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2005.07.102
Keywords
nickel oxide; pyrosol process; work function
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Organic light emitting diodes (OLEDs) need indium tin oxide (ITO) anodes with highly smooth surface. The work function of ITO, about 4.8 eV, is generally rather lower than the optimum level for application to OLEDs. In this work, NiO was deposited by pyrosol process on pyrosol ITO film to increase the work function of the ITO for improving the performance of OLEDs. It was confirmed that NiO was successfully deposited on pyrosol ITO film and the NiO deposition increased the work function of pyrosol ITO, using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM) and atmospheric photoelectron spectroscopy. Furthermore, doping ITO with Ni succeeded in producing the Ni-doped ITO film with high work function and lower sheet resistance. (c) 2005 Elsevier B.V. All rights reserved.
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