Partial carbonization of aromatic polyimide films

被引：4

作者：

Doyama, M ^{[1
]}

Ichida, A ^{[1
]}

Inoue, Y ^{[1
]}

Kogure, Y ^{[1
]}

Nozaki, T ^{[1
]}

Yamada, S ^{[1
]}

机构：

[1] Teikyo Univ Sci & Technol, Yamanashi 4090193, Japan

来源：

INTERNATIONAL JOURNAL OF INORGANIC MATERIALS | 2001年 / 3卷 / 08期

关键词：

aromatic polyimide; carbonization of polyimide; semiconductors; p-type semiconductors; Hall coefficient; electrical conductivity;

D O I：

10.1016/S1466-6049(01)00106-4

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Aromatic polyimide films are partially carbonized between 700 and 1000 degreesC in an atmosphere of hydrogen or nitrogeit electrical conductivity and Hall coefficient have been measured. Electrical conductivity is higher at higher measuring temperatures. The electrical conductivity sigma- can be expressed as sigma- = sigma (o) exp(-E/kT), where k is the Boltzman constant; T is the absolute temperature; E depends upon the carbonized temperature. The experimental data show the Hall coefficient R-H is negative, and this implies the majority carriers are negatively charged, i.e. electrons. The specimens are n-type semiconductors. The carrier density eta can be expressed by eta = A(i) exp(-E-1 / kT) and carrier mobility mu can be expressed by mu = A(2) exp(E-2/kT), E, E-1 and E-2 depend upon the carbonized temperature. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1105 / 1107

页数：3