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Enhancement of Thermoelectric Properties in Bi–Sb–Te Alloy Nanowires by Pulsed Electrodeposition
Author(s) -
Li Liang,
Xu Sichao,
Li Guanghai
Publication year - 2015
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201500071
Subject(s) - nanowire , materials science , thermoelectric effect , seebeck coefficient , crystallinity , thermal conductivity , thermoelectric materials , electrical resistivity and conductivity , alloy , figure of merit , optoelectronics , nanotechnology , metallurgy , composite material , electrical engineering , physics , thermodynamics , engineering
We report the optimization of Bi–Sb–Te thermoelectric nanowires by electrodeposition. We show that stoichiometric Bi 0.5 Sb 1.5 Te 3 nanowires have the highest Seebeck coefficient. The pulse‐deposited Bi 0.5 Sb 1.5 Te 3 nanowires have a more uniform growth front and a high crystallinity and, thus, a larger electrical and thermal conductivity than those of direct current (DC)‐deposited nanowires. The pulse‐deposited nanowires also have a high Seebeck coefficient as they have a more homogeneous distribution of the elements. The figure of merit of the pulse‐deposited single Bi 0.5 Sb 1.5 Te 3 nanowires can be as high as 1.14 at 330 K and is approximately 54 % higher than that of the DC‐deposited nanowires.