【摘要】 制备了结构为indium-tin-oxide(ITO)/polystyrene(PS)∶N,N’-bis-(3-Naphthyl)-N,N’-biphenyl-(1,1’-biphenyl)-4,4’-diamine(NPB)/tris-(8-hydroxyquinoline)-aluminum(Alq3)/Mg∶Ag的绿光双层有机电致发光器件(OLED).空穴传输层采用复合结构,为有机小分子空穴传输材料NPB与聚合物母体材料聚苯乙烯(PS)的掺杂体系,并利用旋涂工艺简化了薄膜制备.通过调节该体系的组分,制备出具有不同PS∶NPB浓度比的OLED器件,并对器件的电致发光特性进行了表征.研究发现,不同的NPB掺杂浓度对复合空穴传输层以及器件的光电特性具有显著影响.当PS和NPB的组分浓度比为1时,可以最大限度地优化该器件的性能.该项研究有助于OLED器件复合功能层的构建以及工艺方法的改进.更多还原

【Abstract】 Green organic light-emitting devices with the structure of indium-tin-oxide (ITO)/polystyrene(PS)∶N,N’-bis-(3-naphthyl)-N,N’-biphenyl-(1,1’-biphenyl)-4,4’-diamine (NPB)/tris-(8-hydroxyquinoline)-aluminum (Alq3)/Mg∶Ag were fabricated.A doping system consisting of small-molecular hole transporting material NPB and polymeric matrix polystyrene (PS) was employed as the compound hole transporting layer (HTL),and the thin film preparation was simplified via the spin-coating technique.By adjusting the component ratio of the system,we constructed several devices with different concentration proportions of PS∶NPB.The electroluminescent characteristics of the devices were investigated and discussed.The results demonstrate that the doping concentration of NPB has a remarkable impact on the optoelectric performance of both the HTL and the device.Optimum device performance could be obtained by choosing the best concentration proportion of PS∶NPB to be 1∶1.This contributes to the construction of compound functional layers of OLED devices and to the technical improvement.更多还原