Strong red emission in heterojunctions of conjugated polymer blends

被引：14

作者：

Li, ZL

Meng, HF ^{[1
]}

Horng, SF

Hsu, CS

Chen, LC

Chang, SM

机构：

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

[2] Natl Tsing Hua Univ, Dept Elect Engn, Hsinchu 300, Taiwan

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

[4] Delta Optoelect Inc, Hsinchu 300, Taiwan

[5] Natl Taipei Univ Technol, Inst Organ & Polymer Mat, Taipei 106, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 24期

关键词：

D O I：

10.1063/1.1760599

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate strong red electroluminescence in bilayer polymer light-emitting diodes with poly(3-hexylthiophene) and polyfluorene copolymers. The emission spectrum of the diode, peaked at 612 nm, is different from either of the two polymer layers, and is attributed to the exciplex state existing only at the heterojunction. The efficiency of this junction emission is very high for red polymer light-emitting diodes. Peak luminance of 3500 cd/m(2) with yield 1.3 cd/A is achieved. The emission color can be made more saturated by blending red-emitting polymers into the polyfluorene to eliminate the small residual green emission. (C) 2004 American Institute of Physics.

引用

页码：4944 / 4946

页数：3

共 14 条

[1]

Bernius MT, 2000, ADV MATER, V12, P1737, DOI 10.1002/1521-4095(200012)12:23<1737::AID-ADMA1737>3.0.CO

[2]

2-N

[3] White light emission from exciplex in a bilayer device with two blue light-emitting polymers [J].