Asymmetric pentacene derivatives for organic light-emitting diodes

被引：61

作者：

Jang, BB

Lee, SH

Kafafi, ZH ^{[1
]}

机构：

[1] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA

[2] SFA Inc, Largo, MD 20774 USA

来源：

CHEMISTRY OF MATERIALS | 2006年 / 18卷 / 02期

关键词：

D O I：

10.1021/cm052069h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two aryl-substituted red emitting pentacenes, 5,6,13,14-tetraphenylpentacene (asym-TPP) and 5,14-bis(2,6-dimethylphenyl)-6,13-diphenylpentacene (DMPDPP), have been prepared and spectroscopically characterized. Guest-host films of pentacene derivatives dispersed in tris(quinolin-8-olato)aluminum(HI) (Alq(3)) exhibit narrow red emission (lambda(max) = 663-680 nm), indicative of efficient Forster energy transfer from the Alq(3) host to the guest molecules. Solid-state absolute photoluminescence quantum yields of the films were measured as a function of guest molecule concentration (Phi(PL) similar to 20% at 0.20-0.50 mol%). Red light-emitting diodes based on the fluorescent DMPDPP yield external electroluminescence quantum efficiency (eta(EL) similar to 1%) close to the theoretical limit.

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收藏

页码：449 / 457

页数：9

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