Confinement of charge carriers and excitons in electrophosphorescent devices: Mechanism of light emission and degradation

被引：48

作者：

Chin, Byung Doo

Lee, Changhee

机构：

[1] Korea Inst Sci & Technol, Optoelect Mat Res Ctr, Seoul 130650, South Korea

[2] Seoul Natl Univ, Sch Elect Engn & Comp Sci, Seoul 151600, South Korea

来源：

ADVANCED MATERIALS | 2007年 / 19卷 / 16期

关键词：

D O I：

10.1002/adma.200602509

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Charge-carrier and exciton confinement is essential for efficiency and stability enhancment of electrophosphorescent devices. Emission-layer lifetimes of a 4,4'-N,N'-dicarbazole-biphenyl host doped with either a red- or green-emitting dye (upper and lower figures) show a strong dependence and near independence, respectively, on the type of exciton blocking layer used (four are shown). This is explained using energy-level differences and corresponding charge-trapping behavior.

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页码：2061 / +

页数：7

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