Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5403364 | Journal of Luminescence | 2007 | 5 Pages |
Abstract
Efficient polymer white-light-emitting diodes (WPLEDs) have been fabricated with a single layer of fluorescent polymer blend. The device structure consists of ITO/PEDOT/PVK/emissive layer/Ba/Al. The emissive layer is a blend of poly(9,9-dioctylfluorene) (PFO), phenyl-substituted PPV derivative (P-PPV) and a copolymer of 9,9-dioctylfluorene and 4,7-di(4-hexylthien-2-yl)-2,1,3-benzothiadiazole (PFO-DHTBT), which, respectively, emits blue, green and red light. The emission of pure and efficient white light was implemented by tuning the blend weight ratio of PFO: P-PPV: PFO-DHTBT to 96:4:0.4. The maximum current efficiency and luminance are, respectively, 7.6Â cd/A at 6.7Â V and 11930Â cd/m2 at 11.2Â V. The CIE coordinates of white-light emission were stable with the drive voltages.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Qiaoli Niu, Yunhua Xu, Jiaxing Jiang, Junbiao Peng, Yong Cao,