UV photocurrent spectroscopy in poly(p-phenylene vinylene) and derivatives

被引：12
|
作者：
Kohler, A
dosSantos, DA
Beljonne, D
Shuai, Z
Bredas, JL
Friend, RH
Moratti, SC
Holmes, AB
机构：
[1] UNIV MONS,SERV CHIM MAT NOUVEAUX,CTR RECH ELECT & PHOTON MOL,B-7000 MONS,BELGIUM
[2] UNIV CAMBRIDGE,MELVILLE LAB POLYMER SYNTH,CAMBRIDGE CB2 3RA,ENGLAND
来源：
SYNTHETIC METALS | 1997年 / 84卷 / 1-3期
关键词：
photoconductivity; poly(phenylene vinylene) and derivatives; semi-empirical models and model calculations;
D O I：
10.1016/S0379-6779(96)04104-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present photocurrent measurements of poly(p-phenylene vinylene) (PPV) and derivatives for photon energies up to 5.0 eV. We observe photocurrent peaks related to the first, second and third absorption peaks, which we associate with the dissociation of a succession of increasingly energetic excitons. We have performed INDO/SCI calculations for the five-ring PPV oligomer, which show different distributions of the electronic charge of the exciton wavefunction over the chain at different excitation energies. We discuss the significance of these states for the photoconduction in PPV and question the applicability of a band-based model.
引用
收藏
页码：675 / 676
页数：2
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