摘要
制作了掺杂rubrene和4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9,enyl)-4H-pyran(DCJTB)两种荧光染料的红光有机电致发光器件。N,N’-diphenyl-N,N’-bis(1-naphthyl)-(1,1’-biphenyl)-4,4’-diamine(NPB)和掺杂的Tri-(8-hydroxyquinoline)aluminum(Alq3)分别作为空穴和电子传输层。我们发现掺rubrene和DCJTB的器件性能与只掺DCJTB的器件性能相比有所提高。器件性能的改善是因为掺入的rubrene能够促进从Alq3到DCJTB的能量转移。根据荧光衰减曲线,计算出从Alq3到DCJTB、从Alq3到rubrene以及从rubrene到DCJTB的能量转移速率分别为1.04×109,3.89×109,2.79×109s-1。可以看出能量通过rubrene从Alq3到DCJTB的转移速率是能量直接从Alq3到DCJTB的2.7倍。
We report the red organic light-emitting diodes doped with rubrene and 4-(dicyanomethylene)-2-
t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB). N, N'-diphenyl-N, N'-bis( 1-naph-
thyl)-(1, 1'-biphenyl)-4, 4'-diamine (NPB) and doped tri-(8-hydroxyquinoline)aluminum(Alq3) are used as hole and electron-transport layers, respectively. The performances of the co-doped diodes were found to be improved compared to the only DCJTB doped diodes. We attribute the improvement to rubrene which assists the energy transfer from Alq3 to DCJTB more efficiently. The energy transfer rates from Alq3 to DCJTB, from Alq3 to rubrene, and from rubrene to DCJTB are proximately calculated to be 1.04×109, 3.89×10 , 2.79×109s-1 according to the fit of the fluorescence decay curves, respectively. It can be seen clearly that the energy transfer rate from Alq3 to DCJTB through rubrene is 2.7 times higher than that from Alq3 to DCJTB directly.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2003年第6期592-598,共7页
Chinese Journal of Luminescence
基金
国家自然科学基金资助项目(59973007
60077014
69827002
5001161951)
