物理学报2011，Vol.60Issue(3)：585-590,6.
NPB:CBP复合空穴传输层对黄色有机电致发光器件的影响
Influence of NPB:CBP modulated hole transporting layer on yellow organic light-emitting device characteristics
摘要
Abstract
Organic light-emitting devices (OLEDs) with the structure of indium-tin oxide (ITO)/N, N′-diphenyl-N, N′-bis( 1-naphthyl-phenyl ) -1, 1 ′-biphenyl-4, 4′-diamine (NPB):4, 4′-N, N′-dicarbazole-biphenyl (CBP)/CBP: bis [ 2- (4-tert-butylphenyl) benzothiazolato-N, C2′] iridium ( acetylacetonate ) [ ( t-bt )2Ir ( acac ) ]/2, 9-dimethyl-4, 7-diphenylphenanthroline (BCP)/Mg: Ag were fabricated. A doping system consisting of NPB and CBP was employed as the modulated hole transporting layer. The electroluminescent characteristics of the OLEDs were investigated by adjusting the concentration proportions of NPB:CBP doping system. The results showed that the hole transporting capability can be adjusted and the power efficiency was remarkably affected by different doping concentration of NPB: CBP system.Optimized yellow light OLED with a maximum power efficiency of 18. 1 lm/W was obtained with an optimum concentration proportion of NPB: CBP of approximately 1: 3. The improved OLED performance was attributed to the reduction of hole injection and low transporting capability by doping bipolar host material CBP in hole transporting layer, which significantly enhanced charge carrier balance and electron-hole recombination probability.关键词
有机电致发光器件(OLEDs)/复合空穴传输层/NPB:CBP/器件性能Key words
organic light-emitting devices (OLEDs)/ mixed hole transporting layer/ NPB:CBP/ device performance引用本文复制引用
陈苏杰,于军胜,文雯,蒋亚东..NPB:CBP复合空穴传输层对黄色有机电致发光器件的影响[J].物理学报,2011,60(3):585-590,6.基金项目
国家自然科学基金(批准号:60721001),60736005和60425101-1),国家高技术研究发展规划(批准号:2007AA03Z424),教育部新世纪优秀人才基金(批准号:NCET-06-0812),教育部留学归国基金(批准号:GGRYJJ08-05),四川省青年基金(批准号:09ZQ026-074),部级基金(批准号:9140A02060609DZ0208),教育部博士点基金(批准号:20090185110020)的资助的课题. （批准号:60721001）
