Premium
Highly enhanced thermoelectric performance in BiCuSeO ceramics realized by Pb doping and introducing Cu deficiencies
Author(s) -
Chen YueXing,
Shi Kang-Di,
Li Fu,
Xu Xiao,
Ge Zhen-Hua,
He Jiaqing
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16469
Subject(s) - spark plasma sintering , thermoelectric effect , materials science , doping , ceramic , thermoelectric materials , sintering , metallurgy , analytical chemistry (journal) , composite material , optoelectronics , thermal conductivity , chemistry , thermodynamics , physics , chromatography
In recent years, BiCuSeO oxyselenides have been developed as a promising thermoelectric material. In this article, Pb x Bi 1− x Cu 1− y SeO ( x = y = 0, 0.02, 0.04, 0.06, and 0.08) are prepared by solid‐state reaction method and spark plasma sintering (SPS), and the combinatorial effects of Pb doping and Cu deficiencies on thermoelectric properties are investigated systematically. The transport properties are significantly enhanced due to the optimized carrier density, majorly contributing to the promotion of ZT values. As a result, the maximum ZT of 0.77 at 873 K and average ZT (from 300 to 873 K) of 0.50 are obtained for Pb 0.06 Bi 0.94 Cu 0.94 SeO sample. The values are 0.4 and 1.2 times, respectively, higher than that of pristine sample.