期刊
JOURNAL OF APPLIED PHYSICS
卷 105, 期 3, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3077170
关键词
carrier density; molybdenum compounds; organic light emitting diodes; organic semiconductors; semiconductor thin films; ultraviolet photoelectron spectra; X-ray photoelectron spectra
资金
- National Science Council, Republic of China [NSC 95-2745-M-002-011]
The origins of barrier lowering leading to high efficient organic light emitting devices with incorporation of molybdenum oxide (MoOx) in anode structures are investigated. Ultraviolet and x-ray photoemission spectra reveal that p-type doping effects in the organic films and carrier concentration increase at the anode interfaces cause the hole injection barrier lowering. The gap states, which help carrier injection from the anodes, resulted from the oxygen deficiency in MoOx due to the interaction of organic materials and MoOx.
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