Photoinduced absorption and excitation spectra studies of excited states in a cyano-derivative of poly(p-phenylenevinylene)

被引：13

作者：

Harrison, NT ^{[1
]}

Baigent, DR ^{[1
]}

Halls, JJM ^{[1
]}

Pichler, K ^{[1
]}

Friend, RH ^{[1
]}

机构：

[1] CAMBRIDGE DISPLAY TECHNOL,CAMBRIDGE CB3 0DJ,ENGLAND

来源：

SYNTHETIC METALS | 1996年 / 76卷 / 1-3期

基金：

英国工程与自然科学研究理事会;

关键词：

photoinduced absorption; excitation; poly(p-phenylenevinylene);

D O I：

10.1016/0379-6779(95)03416-H

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have identified in a cyano-substituted derivative of poly (p-phenylenevinylene) a broad photoinduced absorption signal at 1.3 eV from a photoexcited state with a lifetime of 0.2 ms at 20 K, which we assign to the triplet exciton. We present here excitation spectra in the range 2-5 eV of the triplet-triplet photoinduced absorption, and photoluminescence signals, which are both broadly flat above the onset of the linear absorption. From these results we conclude that quantum efficiencies of singlet and triplet exciton generation are constant over the excitation range.

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收藏

页码：43 / 45

页数：3

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