THERMAL ANALYSES OF COMPOUND SEMICONDUCTORS USING DIFFERENTIAL SCANNING CALORIMETRY - APPLICATION TO COMPOSITIONAL ANALYSES OF CATHODICALLY ELECTROSYNTHESIZED CADMIUM TELLURIDE

被引：15

作者：

LIN, WY ^{[1
]}

MISHRA, KK ^{[1
]}

MORI, E ^{[1
]}

RAJESHWAR, K ^{[1
]}

机构：

[1] UNIV TEXAS,DEPT CHEM,ARLINGTON,TX 76019

来源：

ANALYTICAL CHEMISTRY | 1990年 / 62卷 / 08期

关键词：

D O I：

10.1021/ac00207a010

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Differential scanning calorimetry (DSC) was used, we believe for the first time, for compositional analyses of a compound semiconductor. The Cd-Te system electrosynthesized by a cathodic route was used as a model to define the limits and power of this analytical tool. Thus changes in the composition of the electrodeposited material were monitored as a function of deposition potential. Samples deposited at potentials ≥-600 mV (vs SCE) contained excess Te in addition to CdTe and those synthesized at −696 and −698 mV contained both excess Cd and Te. The composition switched abruptly to a large excess of Cd near 700 mV. The excess Cd and Te were detected and quantltated by their characteristic DSC signals at 318 and 447 °C, respectively. Changes in compositional profiles as a function of solution hydrodynamics and Te02 concentration as well as chemical reactions between the excess Cd and Te are described. © 1990, American Chemical Society. All rights reserved.

引用

页码：821 / 825

页数：5

共 41 条

[1]

Adams R. N., 1969, ELECTROCHEMISTRY SOL

[2] ELECTROLESS DEPOSITION OF CDTE THIN-FILMS [J].