期刊
JOURNAL OF APPLIED PHYSICS
卷 108, 期 1, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3456997
关键词
-
资金
- FCT-Portugal [PTDC/QUI/65474/2006, PTDC/FIS/72831/2006]
- FCT [SFRH/BPD/38169/2007]
- Fundação para a Ciência e a Tecnologia [PTDC/FIS/72831/2006, SFRH/BPD/38169/2007] Funding Source: FCT
Light-emitting diodes based on blends of the two green-emitting polymers, poly (9,9-dioctylfluorene- alt-benzothiadiazole), F8BT, and poly (9,9-dioctylfluorene-alt-bithiophene), F8T2, show efficiencies that lie in between those of the devices based on the neat polymers (with a maximum efficiency of approximately 4 cd/A for the devices with magnesium cathodes based on F8BT), except for the blend with 5% by weight of F8T2, which is more efficient than the device based on neat F8BT (a maximum efficiency of approximately 5 cd/A is obtained). In view of the lower photoluminescence efficiency of F8T2, we attribute this improvement to the improved hole transport brought about by F8T2, though is surprising that 5% by weight, is enough to significantly improve the charge balance within the emissive layer. A detailed photophysics study was carried out for the neat polymers and their blends and no clear evidence for energy transfer between the components was found. This unanticipated devices performance improvement points to the need of a deeper screening of available conjugated luminescent polymers. (C) 2010 American Institute of Physics. [doi:10.1063/1.3456997]
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据