Comparative studies on the inorganic and organic p-type dopants in organic light-emitting diodes with enhanced hole injection
| Autor: | Lei Zhang, Zhao-Kui Wang, Chun-Hong Gao, Liang-Sheng Liao, Zhu Xiaozhao, Dong-Ying Zhou |
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| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Materials science Physics and Astronomy (miscellaneous) Dopant business.industry Doping Analytical chemistry Infrared spectroscopy Electron acceptor Molybdenum trioxide chemistry.chemical_compound chemistry OLED Optoelectronics Absorption (electromagnetic radiation) business Diode |
| Zdroj: | Applied Physics Letters. 102:153301 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.4802081 |
| Popis: | Comparative studies on inorganic and organic electron acceptors used as p-dopants in N,N′-di(naphthalene-1-yl)-N,N′-diphenyl-benzidine (NPB) in organic light-emitting diodes (OLEDs) are carried out. It demonstrates that 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile (HAT-CN) doped hole-injecting layer is superior to molybdenum trioxide (MoO3) doped one in device efficiency and stability. Combining with absorption spectral measurement, the effectiveness of a p-doped NPB in OLEDs does not solely rely on the generation of charge-transfer complexes in the doped NPB. The detailed difference between MoO3 and HAT-CN as p-dopants in NPB is further investigated by evaluating the hole injection efficiency, hole barrier height, and surface morphology of the doped films. |
| Databáze: | OpenAIRE |
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