Effects of polymer sidebranching in double- and single-layer polyfluorene light-emitting diodes

被引：32

作者：

Nakazawa, YK

Carter, SA ^{[1
]}

Nothofer, HG

Scherf, U

Lee, VY

Miller, RD

Scott, JC

机构：

[1] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA

[2] Max Planck Inst Polymer Res, D-55021 Mainz, Germany

[3] IBM Corp, Almaden Res Ctr, Div Res, San Jose, CA 95120 USA

来源：

APPLIED PHYSICS LETTERS | 2002年 / 80卷 / 20期

关键词：

D O I：

10.1063/1.1473692

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We study how changes in sidebranching in electroluminescent polymers affect the performance of polyfluorene-based light-emitting diodes with and without additional hole transport materials. We observe that light emission and device efficiency are determined more by the position of the exciton recombination zone than by changes in the polymer morphology induced by sidebranching. Consequently, we find that sidebranching mainly controls the relative emission between vibrational energy levels and has a minimal effect on polymer charge transport properties. Light outputs of 10 000 cd/m(2) and device efficiencies of 0.85 and 1.8 cd/A are obtained for single- and double-layer devices, respectively. (C) 2002 American Institute of Physics.

引用

页码：3832 / 3834

页数：3

共 24 条

[1]

[Anonymous], COMMUNICATION

[2] Electrical and photoinduced degradation of polyfluorene based films and light-emitting devices [J].