Percolation-dominated conductivity in a conjugated-polymer-carbon-nanotube composite

被引：410

作者：

Coleman, JN ^{[1
]}

Curran, S ^{[1
]}

Dalton, AB ^{[1
]}

Davey, AP ^{[1
]}

McCarthy, B ^{[1
]}

Blau, W ^{[1
]}

Barklie, RC ^{[1
]}

机构：

[1] Univ Dublin Trinity Coll, Dept Phys, Dublin 2, Ireland

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.58.R7492

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have made electrical measurements on a system using carbon nanotubes as the dopant material. A semiconjugated, organic polymer was mixed with carbon nanotubes to form a wholly organic composite. Composite formation from low to high nanotube concentration increases the conductivity dramatically by ten orders of magnitude, indicative of percolative behavior. Effective mobilities were calculated from the space-charge regions of the current-voltage characteristics for the 0-8 % mass fractions. After an initial rise these were seen to fall from 1-8 % doping levels as predicted by theory. From the values for conductivity and mobility, an effective carrier density was calculated. This was seen to decrease between 0% and 1%, before rising steadily. [S0163-1829(98)51536-6].

引用

页码：R7492 / R7495

页数：4

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