Efficient ultraviolet-blue polymer light-emitting diodes based on a fluorene-based non-conjugated polymer
Efficient ultraviolet-blue polymer light-emitting diodes based on a fluorene-based non-conjugated polymer
复制标题
DOI：
10.1063/1.2336745
复制
发表时间：
2006-08
影响因子：
4
通讯作者：
F. Huang;Y. Niu;Michelle Liu;Xing‐Hua Zhou;Yanqing Tian;A. Jen
中科院分区：
文献类型：
--
作者：
F. Huang;Y. Niu;Michelle Liu;Xing‐Hua Zhou;Yanqing Tian;A. Jen
制备了基于荧基非共轭聚合物poly[2，7-(9，9-dihexylfluorene)-alt-4，4′-phenylether]的高效紫外蓝光聚合物发光二极管。以PFPE为发光层的器件具有很窄的紫外蓝电致发光，峰值位于397 nm，最大外量子效率为1.07%。通过在聚N-乙烯基咔唑(PVK)中加入PFPE，可以进一步提高器件的性能。采用质量比为95：5的聚偏氟乙烯和聚全氟乙烯共混物作为发射层，其最大外量子效率为1.81%，最大辐射功率密度为1223μW/cm~2。
Efficient UV-blue polymer light-emitting diodes based on a fluorene-based nonconjugated polymer, poly[2,7-(9,9-dihexylfluorene)-alt-4,4′-phenylether] (PFPE), are fabricated. The device with PFPE as emitting layer shows a very narrow ultraviolet-blue electroluminescence emission with a peak at 397nm and a maximal external quantum efficiency of 1.07%. By blending PFPE into poly(N-vinylcarbazole) (PVK), the device performance can be further improved. A maximum external quantum efficiency of 1.81%, with a maximum irradiance power density of 1223μW∕cm2, was reached by using a blend of PVK and PFPE in the weight ratio of 95:5 as emitting layer.