Work

Lower temperature of the structural transition, and thermoelectric properties in Sn-substituted GeTe

Year: 2020

Type: article

Abstract: GeTe is a potential thermoelectric material for mid-temperature range applications. Here, we report on GeTe and Ge0.9Sn0.1Te prepared using a fast and simple arc-melting method. Their crystal structures have been analyzed by synchrotron X-ray diffraction. Calorimetry identified a shift in the rhombohedral to cubic structural transition temperature from 700 K to 557 K due to Sn alloying. Nevertheless, the temperature of the maximum Seebeck-coefficient is preserved, at 770 K. The thermoelectric properties are also reported, with a strong decrease of electric and thermal conductivities of the Sn-doped compound, as compared to the undoped one. The Hall-mobility also decreases strongly upon doping.

Source: Materials Today Proceedings

DOI: 10.1016/j.matpr.2020.03.044

Authors: J. Gainza, F. Serrano-Sánchez, N.M. Nemes, O.J. Dura, J.L. Martínez, J.A. Alonso

Institutions: Universidad Complutense de Madrid, Consejo Superior de Investigaciones Científicas, Instituto de Ciencia de Materiales de Madrid, University of Castilla-La Mancha

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $150

Funder: Ministerio de Ciencia, Innovación y Universidades