Synergetic Effect of Efficient Energy Transfer and 3D π−π Stack for White Emission Based on the Block Copolymers Containing Nonconjugated Spacer

Synergetic Effect of Efficient Energy Transfer and 3D π−π Stack for White Emission Based on the Block Copolymers Containing Nonconjugated Spacer

A series of block copolymers containing nonconjugated spacer and 3D π−π stacking structure with simultaneous blue-, green-, and yellow-emitting units has been synthesized and characterized. The dependence of the energy transfer and electroluminescence (EL) properties of these block copolymers on the...

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Veröffentlicht in:The journal of physical chemistry. B 2009-04, Vol.113 (13), p.4203-4208
Hauptverfasser: Lu, Junjian, Li, Hui, Yao, Bing, Zhao, Bin, Weng, Chao, Lei, Gangtie, Shen, Ping, Xie, Zhiyuan, Tan, Songting
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B: Macromolecules, Soft Matter
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container_end_page 4208
container_issue 13
container_start_page 4203
container_title The journal of physical chemistry. B
container_volume 113
creator Lu, Junjian
Li, Hui
Yao, Bing
Zhao, Bin
Weng, Chao
Lei, Gangtie
Shen, Ping
Xie, Zhiyuan
Tan, Songting
description A series of block copolymers containing nonconjugated spacer and 3D π−π stacking structure with simultaneous blue-, green-, and yellow-emitting units has been synthesized and characterized. The dependence of the energy transfer and electroluminescence (EL) properties of these block copolymers on the contents of oligo(phenylenevinylene)s has been investigated. The block copolymer (GEO8-BEO-YEO4) with 98.8% blue-emitting oligomer (BEO), 0.8% green-emitting oligomer (GEO), and 0.4% yellow-emitting oligomer (YEO) showed the best electroluminescent performance, exhibiting a maximum luminance of 2309 cd/m2 and efficiency of 0.34 cd/A. The single-layer-polymer light-emitting diodes device based on GEO2-BEO-YEO4 emitted greenish white light with the CIE coordinates of (0.26, 0.37) at 10 V. The synergetic effect of the efficient energy transfer and 3D π−π stack of these block copolymers on the photoluminescent and electroluminescent properties are investigated.
doi_str_mv 10.1021/jp808740x
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title Synergetic Effect of Efficient Energy Transfer and 3D π−π Stack for White Emission Based on the Block Copolymers Containing Nonconjugated Spacer
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