Improved device efficiency and color purity:: Spectral redshift and line narrowing for poly [2-methoxy,5-(2-ethylhexyloxy)-1,4-phenylenevinylene] via blending with phenyl-substituted poly [p-phenylene vinylene] derivatives

被引：18

作者：

Zhang, Y ^{[1
]}

Peng, JB ^{[1
]}

Mo, YQ ^{[1
]}

Cao, Y ^{[1
]}

机构：

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

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 22期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.1828594

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Highly efficient light-emitting diodes with redshifted narrow emission were realized based on blends of poly [2-methoxy,5-(2-ethylhexyloxy)-1,4-phenylene vinylene] (MEH-PPV) and phenyl-substituted poly [p-phenylene vinylene] derivative (P-PPV). EL emissions of blend device were redshifted about 18 nm from the peak emission of 582 nm for neat MEH-PPV device to around 600 nm for devices from the blend film. The full width at half maximum of MEH-PPV emission from blend film was reduced from 91 to 36 nm. The external quantum and luminous efficiencies of devices from blend films (MEH-PPV:P-PPV=20:80) reached 5.27% and 4.71 cd/A, respectively. The effective energy transfer and solid-state dilution effect of MEH-PPV in P-PPV host were thought of as the origin of the performance enhancement. (C) 2004 American Institute of Physics.

引用

页码：5170 / 5172

页数：3

共 22 条

[1] Nanophase-separated blends of acceptor and donor conjugated polymers.: Efficient electroluminescence from binary polyquinoline/poly(2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene) and polyquinoline/poly(3-octylthiophene) blends [J].