Relaxation dynamics of excitons in thin quaterthiophene films on different substrates

被引：21

作者：

Hopmeier, M

Gebauer, W

Oestreich, M

Sokolowski, M

Umbach, E

Mahrt, RF

机构：

[1] Univ Wurzburg, D-97074 Wurzburg, Germany

[2] Univ Marburg, Fachbereich Phys, D-35032 Marburg, Germany

[3] Univ Marburg, Wissensch Zentrum Mat Wissensch, D-35032 Marburg, Germany

[4] Univ Marburg, Inst Phys Chem, D-35032 Marburg, Germany

来源：

CHEMICAL PHYSICS LETTERS | 1999年 / 314卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(99)01116-1

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：

We compare picosecond time-resolved photoluminescence spectra of thin polycrystalline films of quaterthiophene (4T) vapour deposited on two different substrates: highly oriented pyrolytic graphite (HOPG) and glass. At zero time delay, both films show the same highly resolved vibrational fine structure as isolated 4T molecules. The fine structure remains over time on HOPG, but vanishes within the first 100 ps on glass and is replaced by emission from two luminescent traps. The results explain the line broadening in time-integrated (cw) spectra and yield information on the luminescence quenching in polycrystalline organic films. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：9 / 15

页数：7

共 29 条

[1]

Antolini L, 1998, ADV MATER, V10, P382, DOI 10.1002/(SICI)1521-4095(199803)10:5<382::AID-ADMA382>3.0.CO

[2]

2-Y

[3] THE LOWEST ENERGY SINGLET-STATE OF TETRATHIOPHENE, AN OLIGOMER OF POLYTHIOPHENE [J].