Red light-emitting hyperbranched fluorene-alt-carbazolecopolymers with an iridium complex as the core
Literature Information
Publication Date
2011-07-08
DOI
10.1039/C1PY00075F
Impact Factor
5.582
Authors
Ting Guo, Rong Guan, Jianhua Zou, Jie Liu, Lei Ying, Wei Yang, Hongbin Wu, Yong Cao
View Original
Abstract
Red light-emitting hyperbranched copolymers with an iridium complex as the core and fluorene-alt-carbazole as the branches were synthesized by one-pot Suzuki polycondensation. Efficient energy transfer from the poly(3,6-carbazole-alt-2,7-fluorene) segment to the iridium complex occurs when the Ir complex content is as low as 1 mol% in the copolymer. A maximal external quantum efficiency of 6.1% ph/el and a luminous efficiency of 4.7 cd A−1 were obtained with a CIE coordinate of (0.63, 0.32) for the device made from PFCzPh20NapyIr2 copolymer. The efficiency loss upon the increase of current density is significantly reduced since the highly branched structure could suppress the interchain interaction of polymers and the self quenching of the Ir complex. The integration of a phosphorescent complex into hyperbranched polymers can provide a successful molecular design route for solution-processable polymers for PLED applications.
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Source Journal
Polymer Chemistry
CiteScore:
8.6
Self-citation Rate:
7.3%
Articles per Year:
457
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Recommended Compounds
![5-(2-Phenylpyrazolo[1,5-a]pyridin-3-yl)-2H-pyrazolo[3,4-c]pyridazin-3-amine structure](https://static.chemtradehub.com/structs/865/865362-74-9-0091.webp "5-(2-Phenylpyrazolo[1,5-a]pyridin-3-yl)-2H-pyrazolo[3,4-c]pyridazin-3-amine structure")
5-(2-Phenylpyrazolo[1,5-a]pyridin-3-yl)-2H-pyrazolo[3,4-c]pyridazin-3-amine
CAS Number:
865362-74-9
Molecular Formula:
C18H13N7
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