High-efficiency blue multilayer polymer light-emitting diode fabricated by a general liquid buffer method

被引：36

作者：

Tseng, Shin-Rong ^{[1
]}

Meng, Hsin-Fei ^{[1
]}

Yeh, Chi-Hung ^{[2
]}

Lai, Huan-Chung ^{[2
]}

Horng, Sheng-Fu ^{[2
]}

Liao, Hua-Hsien ^{[2
]}

Hsu, Chain-Shu ^{[3
]}

Lin, Li-Chi ^{[4
]}

机构：

[1] Natl Chiao Tung Univ, Inst Phys, Hsinchu 300, Taiwan

[2] Natl Chiao Tung Univ, Inst Elect Engn, Hsinchu 300, Taiwan

[3] Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu 300, Taiwan

[4] Sci Based Ind Pk, Delta Optoelect, Hsinchu 300, Taiwan

来源：

SYNTHETIC METALS | 2008年 / 158卷 / 3-4期

关键词：

polymer light-emitting diodes; multilayer; blue; white; high efficiency;

D O I：

10.1016/j.synthmet.2007.12.016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A bright, highly efficient blue polymer light-emitting diode is fabricated by spin-coating with multilayer structure. By introducing a liquid buffer layer, the dissolution problem is overcome successfully. This general method can be applied to fabricate arbitrary polymer multilayer structure, in particular the addition of the carrier blocking layers to balance the electron and hole currents and improve the device efficiency. By adding an electron-blocking layer, the external quantum efficiency for blue emission can be increased to 5.5% (9.1 cd/A) which is even higher than the theoretical limit of 5%. The luminance reaches 26,530cd/m(2) and the Commission Internationale de L'Eclairage (CIE) coordinates is (0.15, 0.23). Further more the lifetime is increased by three times relative to the single layer device. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：130 / 134

页数：5

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