期刊
ORGANIC ELECTRONICS
卷 9, 期 3, 页码 333-338出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2007.12.001
关键词
OLED; metal oxide; charge transfer complex; interface; stability
Effects of doping molybdenum trioxide (MoO3) in N,N'-diphenyl-N,N'-bis(1,1'-biphenyl)-4,4'-diamine (NPB) are studied at various thicknesses of doped layer (25-500 angstrom) by measuring the current-voltage characteristics, the capacitance-voltage characteristics and the operating lifetime. We formed charge transfer complex of NPB and MoO3 by co-evaporation of both materials to achieve higher charge density, lower operating voltage, and better reliability of devices. These improved performances may be attributed to both bulk and interface properties of the doped layer. The authors demonstrated that the interface effects play more important role in lowering the operating voltage and increasing the lifetime. (C) 2007 Elsevier B.V. All rights reserved.
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