Tuning Polythiophene Crystallization through Systematic Side Chain Functionalization

被引：147

作者：

Ho, Victor

Boudouris, Bryan W.

Segalman, Rachel A. ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Chem & Biomol Engn, Berkeley, CA 94720 USA

来源：

MACROMOLECULES | 2010年 / 43卷 / 19期

关键词：

FIELD-EFFECT MOBILITY; POLYMER SOLAR-CELLS; MELTING BEHAVIOR; CONJUGATED COPOLYMERS; MICROPHASE SEPARATION; OPTICAL-PROPERTIES; CHARGE-TRANSPORT; POLY(3-ALKYLTHIOPHENES); DEPENDENCE; MORPHOLOGY;

D O I：

10.1021/ma101697m

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A study was conducted to demonstrate tuning of poly(3-alkylthiophenes) (P3AT) crystallization through systematic side chain functionalization. It provided detailed information about the thermal, structural, and electronic properties of a P3AT, poly(3-(20-ethyl)hexylthiophene) (P3EHT). Its properties were compared to two more common P3ATs, poly(3-hexylthiophene), and poly(3-dodecylthiophene) (P3DDT). Three different molecular weights of each type of polymer were synthesized and the molecular weights were controlled such that the average number of thiophene repeat units per chain was approximately the same between the P3HT, P3DDT, and P3EHT series. It was shown that P3DDT and P3EHT, with melting transitions sufficiently removed from the thermal degradation temperature, exhibited a nematic liquid crystalline phase observed by polarized optical microscopy (POM), with a molecular weight-dependent nematic-isotropic transition temperature.

引用

页码：7895 / 7899

页数：5

共 61 条

[41] Diffraction line-shape analysis of poly(3-dodecylthiophene): A study of layer disorder through the liquid crystalline polymer transition [J].