Search

In accordance with the techniques developed for the InP–CdTe and InAs–CdTe systems, within the regions of mutual solubility of initial binary compounds (InP and CdTe, InAs and CdTe), the solid solutions (InP)х(CdTe)1 –x and (InAs)х(CdTe)1 –x assayed as substitutional solid solutions with cubic sphalerite structure were obtained. The X-ray, microscopic, and electron microscope investigations and investigations of surface (acid–base) properties are carried out. The concentration dependences of the studied bulk and surface properties and correlations between them are determined. The expediency of their use as orienting points in the search for new efficient materials for semiconductor gas analysis is demonstrated. Practical recommendations on use of the materials obtained in this work (solid solutions with minimum values of pHiso) for development of sensors and transducers for trace amounts of basic gases are provided. [ABSTRACT FROM AUTHOR]

Comprehensive studies of the volume (structural, optical, electrophysical) and surface (acid-base, adsorption) properties of solid solutions and binary components of the CdS-CdTe and CdSe-CdTe systems are carried out. The regularities in the changes of these properties with a variation in the composition and the parallels between the patterns within each system and under their comparison are established. The leading influence of the common binary component, cadmium telluride, on the properties of solid solutions of both systems is revealed. The possibility of predicting the surface activity of these new materials with respect to gases of different electronic natures is shown on the basis of the results of less labor-intensive studies of the bulk physical and chemical properties (in comparison with direct studies of the surface characteristics, i.e., acid-base and adsorption characteristics). Practical recommendations on using the obtained materials in corresponding sensors are made. [ABSTRACT FROM AUTHOR]