EFFICIENT DEEP-RED ORGANIC LIGHT-EMITTING DIODES BASED ON BLENDING MEH-PPV WITH A SMALL MOLECULE COMPOUND

被引：2

作者：

Li, Chun ^{[1
]}

Huang, Ju ^{[1
]}

Zou, Jian-hua ^{[1
]}

Xu, Miao ^{[1
]}

Zeng, Wen-jin ^{[1
]}

Peng, Jun-biao ^{[1
]}

机构：

[1] S China Univ Technol, Key Lab Special Funct Mat MOE, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Peoples R China

来源：

CHINESE JOURNAL OF POLYMER SCIENCE | 2011年 / 29卷 / 05期

基金：

中国国家自然科学基金;

关键词：

MEH-PPV; Organic light-emitting diodes; Red electroluminescence; Soluble small molecule; HIGHLY EFFICIENT; ELECTROLUMINESCENCE; DEVICE; PHOTOLUMINESCENCE; PHOSPHORESCENT; EMISSION;

D O I：

10.1007/s10118-011-1076-0

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Efficient deep-red organic light-emitting diodes (OLEDs) were investigated based on the blend of poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) with 4,7-bis(5-(7-(9H-carbazol-9-yl)-9,9-dioctyl-9H-fluoren-2-yl) thiophen-2-yl)benzo[c] [1,2,5] thiadiazole (compound 1). By optimizing the blend ratio, the turn-on voltage of the devices was significantly reduced from 4.9 V to 2.4 V. A highest external quantum efficiency of 2.56% was achieved at a blend ratio of 95: 5 (wt) for compound 1: MEH-PPV. The CIE coordinate was measured to be (0.70, 0.30), with the luminescence peak at around 680 nm. Based on experimental observations the improvement mechanism is described.

引用

页码：609 / 614

页数：6

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