Partial carbonization of aromatic polyimide films

M Doyama, A Ichida, Y Inoue, Y Kogure, T Nozaki, S Yamada
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引用次数: 4

Abstract

Aromatic polyimide films are partially carbonized between 700 and 1000°C 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 σ can be expressed as σ=σ0exp(−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 RH is negative, and this implies the majority carriers are negatively charged, i.e. electrons. The specimens are n-type semiconductors. The carrier density η can be expressed by η=A1exp(−E1/kT) and carrier mobility μ can be expressed by μ=A2exp(E2/kT). E, E1 and E2 depend upon the carbonized temperature.

芳香族聚酰亚胺薄膜的部分碳化
芳香族聚酰亚胺薄膜在700 ~ 1000℃的氢或氮气氛中部分碳化,并测量了电导率和霍尔系数。测量温度越高,电导率越高。电导率σ可以表示为σ=σ0exp(−E/kT),其中k为玻尔兹曼常数;T是绝对温度;E取决于碳化温度。实验数据显示霍尔系数RH为负,这意味着大多数载流子带负电荷,即电子。样品为n型半导体。载流子密度η可表示为η=A1exp(−E1/kT),载流子迁移率μ可表示为μ=A2exp(E2/kT)。E E1和E2取决于碳化温度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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