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

作　　者：陈苏杰[1] 于军胜[1] 文雯[1] 蒋亚东[1] 

机构地区：[1]电子科技大学光电信息学院,电子薄膜与集成器件国家重点实验室,成都610054

出　　处：《物理学报》2011年第3期585-590,共6页Acta Physica Sinica

基　　金：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);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;四川省青年基金(批准号:09ZQ026-074)~~

摘　　要：采用N,N′-diphenyl-N,N′-bis(1-naphthyl-pheny1)-1,1′-biphenyl-4,4′-diamine(NPB):4,4′-N,N′-dicarbazole-biphenyl(CBP)掺杂体系为复合空穴传输层,制备了结构为indium-tin oxide(ITO)/NPB:CBP/CBP:bis[2-(4-tert-butylphenyl)benzothiazolato-N,C2′]iridium(acetylacetonate)[(t-bt)2Ir(acac)]/2,9-dimethyl-4,7-diphenyl-phenanthroline(BCP)/Mg:Ag的黄色有机电致发光器件(organic light-emitting devices,OLEDs).通过调节NPB:CBP掺杂体系的组分,研究了不同掺杂质量比的OLEDs的电致发光特性.结果表明,将CPB掺杂到NPB中可调控空穴的传输能力,对器件的发光效率有显著的影响.当NBP和CPB的质量比为1∶3时,器件的的性能得到最大限度的优化,最大功率效率达到18.1lm/W.Organic light-emitting devices （OLEDs） with the structure of indium-tin oxide （ITO） /N,N′-diphenyl-N,N′-bis（1-naphthyl-pheny1）-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 ）2 Ir （ acac ）]/2,9-dimethyl-4,7-diphenyl-phenanthroline （ 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 

分 类 号：TN383.1[电子电信—物理电子学]