Estimate of the effective conjugation length of polythiophene from its [χ(3)(ω;ω,ω,-ω] spectrum at excitonic resonance

被引：49

作者：

Kishino, S

Ueno, Y

Ochiai, K

Rikukawa, M

Sanui, K

Kobayashi, T

Kunugita, H

Ema, K

机构：

[1] Sophia Univ, Dept Phys, Chiyoda Ku, Tokyo 1028554, Japan

[2] Japan Sci & Technol Corp, CREST, Toshima Ku, Tokyo 1710031, Japan

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.58.R13430

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The spectra of the third-order optical nonlinearity, \chi((3))(omega;omega,omega,-omega)\, around excitonic resonance in a spin-coated film and a Langmuir-Blodgett (LB) film of polythiophene derivative, poly(3-[2-((S)-2-methylbutoxy)ethyl]thiophene), were measured using the degenerate four-wave-mixing method. The obtained value of \chi((3))(omega;omega,omega,-omega)\ at the excitonic resonance was similar to 10(-7) esu, which was the largest value ever obtained in conjugated polymers. From the absorption spectra and \chi((3))\ spectra, the average effective conjugation lengths of the spin-coated film and the LB film were estimated to be approximately 20- and 36-thiophene rings, respectively. [S0163-1829(98)50144-0].

引用

页码：13430 / 13433

页数：4

共 19 条

[1] Thin films of poly-3-(oxaalkyl)thiophenes by Langmuir-Blodgett technique [J].