磷光材料fac-tris(2-phenylpyridinato-N,C^(2’))iridium(Ⅲ)对不同荧光材料的敏化作用及发光机制分析  

Study on the Sensitizing Effect of fac-Tris(2-Phenylpyridinato-N,C^(2')) Iridium(Ⅲ) on Two Different Fluorescent Materials

作　　者：宋丹丹[1] 赵谡玲[1] 徐征[1] 张福俊[1] 岳欣[1] 朱海娜[1] 

机构地区：[1]北京交通大学发光与光信息技术教育部重点实验室,北京交通大学光电子技术研究所,北京100044

出　　处：《光谱学与光谱分析》2009年第10期2626-2629,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(60576016;10774013;10804006);"863"计划项目(2006AA03Z0412);教育部博士点基金项目(20070004024;20070004031);北京市科技新星计划项目(2007A024);国家重点基础研究发展计划"973"项目(2003CB314707);教育部留学回国科研启动基金;北京交通大学校基金项目(2005SM057);高等学校学科创新引智计划项目(B08002)资助

摘　　要：在荧光材料中掺杂合适的磷光敏化剂,可以大大提高荧光有机电致发光器件(OLED)的效率。选择磷光材料fac-tris(2-phenylpyridinato-N,C2')iridium(Ⅲ)(Ir(ppy)3)分别与荧光材料4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl(DCJTB)、5,6,11,12,-tetraphenylnaphthacene(Rubrene)掺杂作为发光层,当掺杂质量比合适时,磷光材料的发光消失,得到了纯正的荧光材料的发光。同时,对磷光材料的敏化作用及发光机制进行了分析,比较了Ir(ppy)3对两种不同荧光材料的敏化作用强弱,发现Ir(ppy)3对荧光材料Rubrene的敏化作用更强。对影响敏化作用的因素进行了分析,推测其原因与磷光材料和荧光材料的相容性质有关。It is considered that the efficiency of fluorescent material based organic light emitting diodes can be enhanced by introducing a phosphorescent sensitizer. In the present work, devices with emission layers （EML） of fac-tris（2-phenylpyridinato-N,C^2′） iridium （Ⅲ） （Ir（ppy）3）-sensitized-fluorescent materials were fabricated. Ir（ppy）3 was co-doped with DCJTB and rubrene in PVK matrix, respectively. When the doping ratio was proper, pure emission from fluorescent material can be achieved. Furthermore, the sensitizing mechanism and effect were analyzed. A weak effect between Ir（ppy）3 and DCJTB was found. It was deduced that the weaker sensitizing effect is related to the poor film appearance.

关 键 词：磷光敏化剂 荧光 能量传递 

分 类 号：O434.3[机械工程—光学工程]