Year: 2023
Type: article
Abstract: The article theoretically studies the phase stability of thin films of pseudobinary semiconductor alloys ZnSb–SnTe. The obtained T – x phase diagrams made it possible to predict the existence of a wide miscibility gap. Taking into account small internal stresses and the influence of the quartz substrate did not lead to significant changes in the phase diagram depending on the film thickness. It has been shown that spinodal decomposition processes caused by annealing at T = 225 °C in (ZnSb)1-х(SnTe)х alloys at x = 0.27 lead to microstructural evolution with the formation of precipitates of the SnSb metal phase. This fact is in good agreement with the experimental studies of the thin films considered and is the reason for the sharp increase in the power factor to 3383 μWm-1K-1 at 300 °C. The described recrystallization processes are the main mechanism for the high thermoelectric characteristics of this material. Bibl. 20, Fig. 3.
Source: Journal of Thermoelectricity
Author: V.G. Deibuk
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4409644655