在NPB中掺杂Alq3改善有机电致发光器件的性能  

Improving the Performance of Organic Light-emitting Device Using Doped Alq_3 into NPB

作　　者：王静[1,2] 田兆硕[1] 孙玉德[1] 张兴宝[1] 曲延滨[1] 

机构地区：[1]哈尔滨工业大学(威海)信息光电子研究所,山东威海264209 [2]吉林大学集成光电子国家重点联合实验室,长春130012

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

基　　金：国家自然科学基金资助项目(60207003;60376028;60668016);国家科技部863资助项目(2007A12Z112);国家重点基础研究项目(2003CB314703);吉林省教育厅科研计划项目(吉教科合字[2004]第54号);四平科技局计划项目(四科合字第20030017号);哈尔深工业大学(威海)研究基金资助项目(HIT(WH)Y200802)

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 

分 类 号：TN383.1[电子电信—物理电子学] TN305.3