Electrical conductivity of highly organized Langmuir-Blodgett films of phthalocyaninato-polysiloxane

被引：32

作者：

Silerova, R ^{[1
]}

Kalvoda, L ^{[1
]}

Neher, D ^{[1
]}

Ferencz, A ^{[1
]}

Wu, J ^{[1
]}

Wegner, G ^{[1
]}

机构：

[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

来源：

CHEMISTRY OF MATERIALS | 1998年 / 10卷 / 08期

关键词：

D O I：

10.1021/cm980251v

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：

The electrical properties of phthalocyanine-polysiloxanes were investigated at room temperature. Polymers were deposited in LB films with high in-plane orientational anisotropy, allowing for a directional dependence of the conductivity to be measured. It was found that the conductivity parallel to the preferred orientation of the polymer chains is higher than the conductivity perpendicular to this direction. The orientational anisotropy could be manipulated by using different molecular weight polymers, and by annealing of the polymer films. Lower molecular weight materials showed the least orientational anisotropy, and annealing increased the orientational anisotropy. Using these strategies to intentionally alter the orientational anisotropy, corresponding changes in the conductivity could be detected. It was concluded that the charge transport was fastest along the polymer chains. Interchain charge carrier hops are assumed to be rate limiting, with the process facilitated by end to end orientation between polymer chains.

引用

页码：2284 / 2292

页数：9

共 18 条

[1] STRUCTURAL INVESTIGATION OF PHTHALOCYANINATOPOLY(SILOXANE) LANGMUIR-BLODGETT-FILMS BY X-RAY-DIFFRACTION [J].