Electroluminescence spikes, turn-off dynamics, and charge traps in organic light-emitting devices

被引：27

作者：

Cheon, KO ^{[1
]}

Shinar, J

机构：

[1] US DOE, Ames Lab, Ames, IA 50011 USA

[2] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.69.201306

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The strong electroluminescence (EL) spikes and long tails occurring at the turn-off of a bias pulse in high-quality guest-host small molecular organic light-emitting devices are described and analyzed. The observed behavior of the spikes is found to be in excellent agreement with a model based on correlated charge pairs, with average charge pair separation of 20-50 Angstrom. Immediately following the spike is a long EL tail which decays as 1/t. This tail is due to the recombination of initially independent charges. Hence the EL decay is determined by the dynamics of trapped charges in the recombination zone.

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页码：201306 / 1

页数：4

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