NANOSECOND TIME-RESOLVED ABSORPTION-SPECTRA OF THIN-FILMS OF ALPHA-CONJUGATED THIOPHENE OLIGOMERS

被引：26

作者：

CHENG, X

ICHIMURA, K

FICHOU, D

KOBAYASHI, T

机构：

[1] UNIV TOKYO,FAC SCI,DEPT PHYS,HONGO 7-3-1,TOKYO 113,JAPAN

[2] CNRS,MAT MOLEC LAB,F-94320 THIAIS,FRANCE

来源：

CHEMICAL PHYSICS LETTERS | 1991年 / 185卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(91)85061-Z

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：

Time-resolved photoinduced absorption spectra of vacuum-evaporated thin films of alpha-conjugated thiophene oligomer (alpha-nT) exhibit a transient bleaching with strong oscillations of almost constant energy spacing (DELTA-A = 0.2 eV) in the intra-bandgap region that can be related to the fine structures currently observed in the unperturbed absorption spectra. Exponential decay of the time-resolved absorbance change with time constants of 1.3 +/- 0.1-mu-s, 550 +/- 20 ns and 310 +/- 10 ns, due to the lowest triplet state in the alpha-4T, alpha-5T and alpha-6T respectively, was identified.

引用

页码：286 / 291

页数：6

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