TRANSPORT-PROPERTIES OF FLASH-EVAPORATED (BI1-XSBX)2TE3 FILMS .2. THEORETICAL-ANALYSIS

被引：5
|
作者：
DILLNER, U
VOLKLEIN, F
机构：
[1] Physikalisch-Technisches Institut der Akademie der Wissenschaften der D.D.R., 6900 Jena
来源：
THIN SOLID FILMS | 1990年 / 187卷 / 02期
关键词：
D O I：
10.1016/0040-6090(90)90048-I
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An analysis of the temperature dependence of several transport properties, particularly the Seebeck and Hall coefficients, of thermoelectrically optimized p-type (Bi1 - xSbx)2Te3 films is carried out in the interval from 80 to 350 K for x = 0.75 including a comparison with bulk material data. The model calculations are based on the solution of the homogeneous Boltzmann equation in a relaxation time approximation since the films exhibit an in some ways bulk-like behaviour, e.g. the Hall mobility is of the order of that of the bulk material. In the framework of a one-valence-band model, the analysis of both bulk and film data favours a non-parabolic dispersion relation for Bi0.5Sb1.5Te3. It is shown that acoustic intravalley scattering is the predominant scattering mechanism of the charge carriers in the thermoelectrically optimized films. © 1990.
引用
收藏
页码：263 / 273
页数：11
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