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

页码：1505 / 1510

页数：6

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