Enhanced thermoelectric performance in a percolated bismuth sulfide composite
Journal
RSC Advances
Journal Volume
6
Journal Issue
101
Pages
98952-98955
Date Issued
2016
Author(s)
Wong, D.P.
Chien, W.-L.
Huang, C.-Y.
Chang, C.-E.
Ganguly, A.
Lyu, L.-M.
Hwang, J.-S.
Chen, K.-H.
Abstract
We synthesized a bismuth-rich bismuth sulfide (Bi2+xS3) to improve the electrical conductivity. A percolated composite was obtained by mixing Bi2+xS3 with commercial Bi2S3 so that the other thermoelectric parameters were not compromised. The Bi2+xS3 acted as a conductive percolating channel within the Bi2S3 matrix. This percolation approach retained the high Seebeck coefficient of the Bi2S3 matrix while improving the electrical conductivity. A dimensionless figure of merit (zT) up to five times that of the pure Bi2S3 sample was achieved.
SDGs
Publisher
Royal Society of Chemistry
Type
journal article