磷光染料共掺杂方法提高红光有机发光二极管性能的研究  

Improved electroluminescent performances of red organic light-emitting diodes by phosphorescent dyes co-doping

作　　者：苏文明[1,2] 李文连[1] 辛琦[1] 孙小燕[1] 李天乐[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所激发态物理重点实验室,吉林长春130033 [2]中国科学院研究生院,北京100049

出　　处：《功能材料》2007年第A01期205-207,共3页Journal of Functional Materials

基　　金：Foundation item：Supported by the National Natural Science Foundation of China under the Grant（90201012）

摘　　要：通过两种不同红光磷光染料6％的PtOEP与7％的（btfmp）2Ir（acac）共掺同一基质中作为发光层，使有机电致发光器件的性能全面得到改善,共掺器件的最大效率达到了3．2cd／A，而单一染料6％的PtOEP或7％的（btfmp）2Ir（acac）掺杂器件的效率分别为1．8cd／A和2．9cd／A,另外，共掺杂器件表现出了更低的驱动电压，其效率在大电流下的衰降程度也大大降低,这些改善应归功于提高了发光层中总的掺杂浓度而没有引起相应高的浓度淬灭的结果。The performances of red organic light emitting diodes was improved by co-doping 6wt%PtOEP and 7wt%（btfmp）2Ir（acac） into same host, its maximum EL efficiency was improved to 3.2cd/A comparing with maximum electroluminescent （EL） efficiencies of 1.8cd/A for 6wt%PtOEP and 2.9cd/A for 7wt% （btfmp）2Ir（acac） single-doped devices, respectively. In addition, a weaker efficiency roll-off under high current density and a lower turn on voltage were obtained in co-doped device. The significant improvement could be attributed to enhancement of the total concentration of phosphorescent dyes and a weaker concentration quenching between PtOEP and （btfmp）2Ir（acac）.

关 键 词：共掺杂 磷光染料 高效 有机电致发光 

分 类 号：TN383[电子电信—物理电子学]