Charge Transport and Recombination in Polyspirobifluorene Blue Light-Emitting Diodes

被引：26
|
作者：
Nicolai, Herman T. [1 ]
Hof, Andre [1 ]
Oosthoek, Jasper L. M. [1 ]
Blom, Paul W. M. [1 ,2 ]
机构：
[1] Univ Groningen, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands
[2] Holst Ctr, NL-5605 KN Eindhoven, Netherlands
来源：
ADVANCED FUNCTIONAL MATERIALS | 2011年 / 21卷 / 08期
关键词：
HOLE TRANSPORT; ELECTROLUMINESCENCE; POLYFLUORENE; INJECTION; EFFICIENCY; DISPLAYS;
D O I：
10.1002/adfm.201002293
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The charge transport in blue light-emitting polyspirobifluorene is investigated by both steady-state current-voltage measurements and transient electroluminescence. Both measurement techniques yield consistent results and show that the hole transport is space-charge limited. The electron current is found to be governed by a high intrinsic mobility in combination with electron traps. Numerical simulations on light-emitting diodes reveal a shift in the recombination zone from the cathode to the anode with increasing bias.
引用
收藏
页码：1505 / 1510
页数：6
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