Electronic and thermal transport properties of BaBi2Se4 compound

Abstract

<p>Thermoelectric materials can realize the direct conversion between heat energy and electric energy. BaBi<inf/>Se<inf/> becomes a potential thermoelectric material because of its low thermal conductivity and good electrical conductivity. In this paper, BaBi<inf/>Se<inf/> was selected as a research object, and the phase composition, thermal and electronic properties were investigated. The results show that all the samples exhibit N-type semiconductor conductivity characteristics. Te-alloying can inhibit Bi<inf/>Se<inf/> impurities in the samples and decrease the carrier concentration, thus optimizing the electronic transport performance. Also, the lattice thermal conductivity is low due to the complex crystal structure. These results indicate that BaBi<inf/>Se<inf/> is a potential thermoelectric material.</p>