Fluorene-Based Copolymers Containing Dinaphtho-s-indacene as New Building Blocks for High-Efficiency and Color-Stable Blue LEDs

被引：18

作者：

Guo, Xin ^{[1
,2
]}

Cheng, Yanxiang ^{[1
]}

Xie, Zhiyuan ^{[1
]}

Geng, Yanhou ^{[1
]}

Wang, Lixiang ^{[1
]}

Jing, Xiabin ^{[1
]}

Wang, Fosong ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2009年 / 30卷 / 9-10期

基金：

中国国家自然科学基金;

关键词：

blue light; electroluminescence; energy transfer; light-emitting diodes (LED); luminescence; polyfluorene; LIGHT-EMITTING POLYMERS; ELECTROLUMINESCENT POLYMERS; CONJUGATED COPOLYMERS; NARROW BANDWIDTH; ENERGY-TRANSFER; GREEN EMISSION; POLYFLUORENE; BAND; RED; ORIGIN;

D O I：

10.1002/marc.200800765

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

By incorporating a new building block, 7,7,15,15-tetraoctyldinaphtho-s-indacene (NSI), into the backbone of poly(9,9-dioctylfluorene) (PFO), a novel series of blue light-emitting copolymers (PFO-NSI) have been developed. The insertion of the NSI unit into the PFO backbone leads to the increase of local effective conjugation length, to form low-energy fluorene-NSI-fluorene (FNF) segments that serve as exciton trapping sites, to which the energy transfers from the high-energy PFO segments. This causes these copolymers to show red-shifted emissions compared with PFO, with a high efficiency and good color stability and purity. The best device performance with a luminance efficiency of 3.43 cd . A(-1), a maximum brightness of 6 539 cd . m(-2) and CIE coordinates of (0.152, 0.164) was achieved.

引用

页码：816 / 825

页数：10

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