具有双发光层双主体结构的高效稳定WOLED  

Efficient and stable white organic light-emitting device with dual emission layer consisting of cohost system

作　　者：王强[1,2] 朱文清[1,2] 徐晓明[1,2] 张小文[1,2] 曹进[2] 蒋雪茵[1,2] 张志林[1,2] 

机构地区：[1]上海大学材料科学与工程学院,上海200072 [2]上海大学新型显示技术及应用集成教育部重点实验室,上海200072

出　　处：《光电子．激光》2010年第6期825-828,共4页Journal of Optoelectronics·Laser

基　　金：国家"863"计划资助项目(2008AA03A336);上海市科委资助项目(08DZ1140702);上海市引进技术的吸收与创新年度计划资助项目(06XX-28)

摘　　要：采用双发光层双主体结构,制备了高效稳定的白光有机电致发光器件(WOLED)。其中蓝光层是TBADN:3 wt%DSA-Ph,红光层是[TBADN:Alq3]:1 wt%DCJTB,通过改变红光层中Alq3和TBADN的掺杂比来调节器件的发光效率和颜色。当[TBADN:Alq3]为75∶25时获得了效率最高、色度好和性能稳定的白光,在20 mA/cm2时器件的发光效率为6.27 cd/A,CIE色坐标为(0.364,0.348)。当电流密度为200 mA/cm2时,发光效率仍能保持在6.15 cd/A,色度坐标为(0.344,0.344)。由于在[TBADN:Alq3]双主体结构中,TBADN具有双极性,从而改善了器件中载流子的平衡及其在发光层中的分布,进而提高的器件的性能。An efficient and stable white organic light-emitting device（OLED） with dual emission layer consisting of cohost system is demonstrated.The blue-emitting layer is composed of fluorescent dye DSA-Ph doped into single host TBADN （TBADN：3 wt% DSA-Ph） while the red-emitting layer is fluorescent dye DCJTB doped into cohost system consisting of TBADN and Alq3（[TBADN：Alq3]：1 wt% DCJTB）.The device luminous efficiency and CIE color coordinates could be adjusted by altering the ratio of TBADN to Alq3 in the red-emitting layer.An efficient and stable white OLED with excellent color coordinates is achieved when an optimized ratio （75∶25） of TBADN to Alq3 is used.The maximum luminous efficiency reaches 6.27 cd/A with CIE color coordinate of（0.364,0.348） at the current density of 20 mA/cm2.When the current density increases to 200 mA/cm2,the device luminous efficiency still remains at 6.15 cd/A with CIE color coordinate of（0.344,0.344）.The improved performance of the white OLED is mainly attributed to the ambipolar property of TBADN,which results in the improvement of carrier balance and distribution in the emission layer.

关 键 词：有机电致发光器件(OLED) 白光 双主体 双发光层 

分 类 号：TN383.1[电子电信—物理电子学]