Relaxation and Conductivity in P3HT/PC71BM Blends As Revealed by Dielectric Spectroscopy

被引：21

作者：

Cui, Jing ^{[1
]}

Martinez-Tong, Daniel E. ^{[1
,3
]}

Sanz, Alejandro ^{[1
,4
]}

Ezquerra, Tiberio A. ^{[1
]}

Rebollar, Esther ^{[2
]}

Nogales, Aurora ^{[1
]}

机构：

[1] CSIC, Inst Estruct Mat, Serrano 121, E-28006 Madrid, Spain

[2] CSIC, Inst Quim Fis Rocasolano, Serrano 119, E-28006 Madrid, Spain

[3] Univ Libre Bruxelles, Dept Phys, CP 223,Campus Plaine,Blvd Triomphe, B-1050 Brussels, Belgium

[4] Roskilde Univ, Dept Sci & Environm, DNRF Ctr Glass & Time, IMFUFA, POB 260, DK-4000 Roskilde, Denmark

来源：

MACROMOLECULES | 2016年 / 49卷 / 07期

关键词：

HETEROJUNCTION SOLAR-CELLS; CHARGE-TRANSPORT; X-RAY; ELECTRICAL-CONDUCTIVITY; NEUTRON-SCATTERING; GLASS-TRANSITION; POLYMER; POLY(3-HEXYLTHIOPHENE); CRYSTALLIZATION; MORPHOLOGY;

D O I：

10.1021/acs.macromol.5b02727

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The conduction mechanism and the molecular dynamics on the paradigmatic bulk heterojunction formed by poly(3-hexylthiophene) (P3HT) and phenyl-C-71-butyric acid methyl ester (PC71BM) blends have been characterized by dielectric spectroscopy. The results show that hexyl lateral chains of the polymer exhibit a high frequency local motion, similar to a polyethylene-like relaxation. By dielectric spectroscopy the dependence with temperature of the conductivity has also been studied. The results in the low temperature region provide a method to estimate the energy offsets of the system due to the presence of the C-71 derivative. In the high temperature region, the temperature dependence of the conductivity can be described by the Gaussian disorder model, and we have observed that the energetic disorder in this region does not depend upon the content of PC71BM in the blends.

引用

页码：2709 / 2717

页数：9

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