Preparation and thermoelectric properties of sulfur doped Ag2Te nanoparticles via solvothermal methods.
In this work, n-type Ag(2)Te nanoparticles are prepared by a solvothermal approach with uniform and controllable sizes, e.g. 5-15 nm. The usage of dodecanethiol during the synthesis effectively introduces sulfur doping into the sample, which optimizes the charge carrier concentration of the nanoparticles to >1 × 10(20) cm(-3). This allows us to achieve the desired electrical resistivities of <5 × 10(-6)Ω m. It is demonstrated that Ag(2)Te particles prepared by this solvothermal process can exhibit high ZT values, e.g. 15 nm Ag(2)Te nanoparticles with effective sulphur doping show a maximum ZT value of ~0.62 at 550 K.
School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore.
Wenwen
W
Zhou
Weiyun
W
Zhao
Ziyang
Z
Lu
Jixin
J
Zhu
Shufen
S
Fan
Jan
J
Ma
Huey Hoon
HH
Hng
Qingyu
Q
Yan