摘要
采用复合母体技术制备了一种高效率高显色指数白光有机发光二极管。驱动电压在8 V到12 V变化时,器件的CIE-1931色坐标由(0.343 2,0.339 7)变化到(0.324 3,0.321 8),相关色温由5 035 K变化到5 915 K,其显色指数均保持在90以上。器件在14 V时达到最大亮度,为27 853 cd/m2,在7.5 V时达到最大效率为9.58 cd/A。实验中通过调节绿色和红色发光层的厚度来调节器件的发光光谱,通过敏化绿色和红色发光成分以实现电致发光效率的提高,器件的最大效率比没有采用敏化机制的参比器件提高了73.6%。
High efficiency white organic light-emitting diodes（WOLEDs） with high color rendering index（CRI） was fabricated.The white light was composed by the blue emission of 9,10-di（2-naphthyl） anthracene and the enhanced green and red emissions of tris-（8-hydroxyquinolinato） aluminum and 4-（dicyanomethylene）-2-t-butyl-6-（1,1,7,7-tetramethyljulolidyl-9-enyl）-4H-pyran,respectively.The WOLED shows the Commission Internationale de l＇Eclairage-1931 coordinates vary from（0.343 2,0.339 7） to（0.324 3,0.321 8）,the correlated color temperature varies from 5 035 K to 5 915 K and all the CRIs exceed 90 when the driving voltage changes from 8 V to 12 V.A maximum brightness of 27 853 cd/m2 at 14 V and a peak current efficiency of 9.58 cd/A at 7.5 V are attained,respectively.The electroluminescent（EL） spectrum is tuned by changing the thickness of the green and red emission layers.The efficiency enhancement is realised by sensitising the green and red light emissions.The maximum efficiency is increased by 73.6% compared to the control device.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2012年第3期299-303,共5页
Chinese Journal of Luminescence
基金
秦皇岛市科学技术研究与发展计划(201101A113)
燕山大学博士基金(B580)
吉林省科技发展计划(20110321)资助项目
