Oxide Nanoparticle-Dispersed, Chalcogenide-Based, and Phase-Separated Composite Thermoelectric Material

摘要

Provided is a thermoelectric material containing: a matrix containing a Group 13 element of chalcogenide; and oxide nanoparticles dispersed into the matrix to have excellent thermal stability, wherein the oxide nanoparticle forms a coherent interphase interface with the Group 13 element of the chalcogenide-based matrix and is elongated in a specific direction, such that thermal conductivity may be effectively decreased with a trace amount of the oxide nanoparticle to minimize deterioration of electric conductivity.

主权项

1. A thermoelectric material comprising:
a matrix containing a Group 13 element of chalcogenide according to the following Chemical Formula 1; and oxide nanoparticles dispersed into the matrix:
(A1−xA′x)1±δ1(B1−yB′y)1±δ2  (Chemical Formula 1) in the Chemical Formula 1, A is a Group 13 element, A′ is an element selected from Group 14, B and B′ are different from each other, B is S, Se or Te, B′ is an element selected from Group 15 and Group 16, x is a real number satisfying 0≦x<0.5, y is a real number satisfying 0≦y<0.5, and δ1 and δ2 are each independently real numbers satisfying 0≦δ<0.1.