作　　者： ; ; ; ; ;

机构地区： 哈尔滨工业大学航天学院光电子技术研究所

出　　处： 《固体电子学研究与进展》 2009年第2期245-248,共4页

摘　　要： 在空穴传输层N,N′-diphenyl-N,N′-bis-1-naphthyl-(1,1′-biphenyl)-4,4′-diamine(NPB)中掺杂电子传输材料Aluminium-tris-8-hydroxy-quinoline(Alq3)制备了有机电致发光器件。当掺杂浓度低于5%时器件仍为蓝光发射,但与同等结构没有掺杂的器件相比,蓝光器件的亮度提高了近20%,达到了12460cd/m2,外量子效率提高了15.5%。随着掺杂浓度的增加,光谱发生了从蓝光到绿光的红移,这种掺杂方案能够改善空穴和电子的注入平衡,使得空穴和电子在发光层中能够有效地复合,器件的色度、亮度和效率都有了相应的改变。 We have fabricated the organic light-emitting devices（OLEDs） by introducing the electron transmission material aluminium-tris-8-hydroxy-quinoline（Alq3）into hole transport layer N, N＇-diphenyl-N, N＇ -bis- 1-naphthyl- （ 1,1＇ -biphenyl ）-4,4＇-diamine （NPB）, whose doped concentration affects both color and efficiency of the devices. The OLED is still blue emission when the doped concentration of Alq3is below 5%, compared to the blue devices with a same structure, the brightness increases nearly 20%, up to 12460 cd/m^2, and quantum efficiency increases 15.5 %. The spectrum shifts from blue into green with increasing the doped concentration. The maximum efficiency and luminance of devices are all improved.

关 键 词： 有机电致发光器件 空穴传输 电子传输 掺杂

领　　域： [电子电信] [电子电信]