White Electroluminescence with Simultaneous Three-Color Emission from a Four-Armed Star-Shaped Single-Polymer System

A four-armed star-shaped single-polymer system with 4,7-bis（5-（4-（9H-carbazol-9-yl）phenyl）-4-hexylthio- phen-2-yl）benzo[c][1,2,5]thiadiazole （FTBT） as a red emissive core, polyfluorene （PF） as blue emissive arms and 1,3-benzo thiadiazole （BT） as green emissive dopants was designed and synthesized, i...

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Bibliographic Details
Published in:Chinese journal of chemistry 2015-08, Vol.33 (8), p.873-880
Main Authors: Jiu, Yuanda, Wang, Jianyun, Liu, Chengfang, Lai, Wenyong, Zhao, Lingling, Li, Xiangchun, Jiang, Yi, Xu, Weidong, Zhang, Xinwen, Huang, Wei
Format: Article
Language:English
Subjects:
Förster resonance energy transfer
hyperbranched polymers
multi-armed structures
organic light-emitting diodes
white electroluminescence
三色
光发射
发射武器
星形
电致发光器件
红色发光
聚合物体系
聚合物系统
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Summary:A four-armed star-shaped single-polymer system with 4,7-bis（5-（4-（9H-carbazol-9-yl）phenyl）-4-hexylthio- phen-2-yl）benzo[c][1,2,5]thiadiazole （FTBT） as a red emissive core, polyfluorene （PF） as blue emissive arms and 1,3-benzo thiadiazole （BT） as green emissive dopants was designed and synthesized, in which red, green, and blue （RGB） emission balance can be achieved by adjusting the doping concentration of FTBT and BT discreetly. A typ- ical single-emissive-layer device （ITO/PEDOT：PSS/polymer/TPBI/LiF/Al） was studied and discussed, realizing a pure and stable white emission with a luminous efficiency （LE） of 1.59 cd·A^-1 and CIE coordinates of （0.31, 0.34）. The high-color-quality white electroluminescence of the devices could be mainly attributed to the suppressed in- termolecular interactions, and partial energy transfer from the blue PF arms to the red and green dopants.
ISSN:1001-604X
1614-7065
DOI:10.1002/cjoc.201500308