Improved performance of white polymer light emitting diodes

被引：11
|
作者：
Zou Jian-Hua [1 ]
Tao Hong [1 ]
Wu Hong-Bin [1 ]
Peng Jun-Biao [1 ,2 ]
机构：
[1] S China Univ Technol, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Peoples R China
[2] S China Univ Technol, Key Lab Specially Funct Mat & Adv Mfg Technol, Guangzhou 510640, Peoples R China
来源：
ACTA PHYSICA SINICA | 2009年 / 58卷 / 02期
基金：
芬兰科学院; 中国国家自然科学基金;
关键词：
polymer light emitting diodes; white light; bilayer structure; DEVICES; COPOLYMER; EMISSION; LAYER; BLUE;
D O I：
10.7498/aps.58.1224
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
White polymer light-emitting diodes (WPLEDs) with bilayer structure were fabricated by spin coating method using polymers of different solubilities. The device structure used here is ITO/PEDOT(50 nm)/PVK: PFO-BT: PFO-DBT(40 nm)/PFO(40 nm)/Ba(4 nm)/Al(120 nm) at the weight ratio of 100:4:3 (PVK: PFO-BT: PFO-DBT). White fluorescent light emission with CIE coordinates of (0.33, 0.34) is achieved, and the maximal luminance efficiency of 2.4 cd/A and the maximal luminance of 3215 cd/m(2) are obtained. By attaching a layer of water-soluble electronic transporting material of PFN to the cathode, the maximal luminance efficiencies increase up to 5.28 cd/A with CIE coordinates kept at (0.34, 0.36), and the device stability is also improved.
引用
收藏
页码：1224 / 1228
页数：5
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