10.1021/acsami.5b02504.s001
Heng Quan Yang
Heng Quan
Yang
Lei Miao
Lei
Miao
Cheng Yan Liu
Cheng Yan
Liu
Chao Li
Chao
Li
Sawao Honda
Sawao
Honda
Yuji Iwamoto
Yuji
Iwamoto
Rong Huang
Rong
Huang
Sakae Tanemura
Sakae
Tanemura
A
Facile Surfactant-Assisted Reflux Method for the Synthesis of Single-Crystalline
Sb<sub>2</sub>Te<sub>3</sub> Nanostructures with Enhanced Thermoelectric
Performance
American Chemical Society
2015
Sb 2Te nanoparticles
Sb 2Te bulk materials
CTAB
platelike Sb 2Te nanoparticles
PVP
EG
ZT
Sb 2Te
Enhanced Thermoelectric PerformanceAntimony telluride
2015-07-08 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/A_Facile_Surfactant_Assisted_Reflux_Method_for_the_Synthesis_of_Single_Crystalline_Sb_sub_2_sub_Te_sub_3_sub_Nanostructures_with_Enhanced_Thermoelectric_Performance/2151406
Antimony telluride (Sb<sub>2</sub>Te<sub>3</sub>) and its based alloys are of importance to p-type
semiconductors for thermoelectric applications near room temperature.
Herein, we report a simple, low-energy intensive, and scalable surfactant-assisted
reflux method for the synthesis of Sb<sub>2</sub>Te<sub>3</sub> nanoparticles
in the solvent ethylene glycol (EG) at low temperatures (120–180
°C). The formation mechanism of platelike Sb<sub>2</sub>Te<sub>3</sub> nanoparticles is proposed. Also, it is found that the size,
shape, and chemical composition of the products could be controlled
by the introduction of organic surfactants (CTAB, PVP, etc.) or inorganic
salts (EDTA-Na<sub>2</sub>, NaOH, etc.). Additionally, the collected
Sb<sub>2</sub>Te<sub>3</sub> nanoparticles were further fabricated
into nanostructured pellets using cold-compaction and annealing techniques.
Low resistivity [(7.37–19.4) × 10<sup>–6</sup> Ω
m], moderate Seebeck coefficient (103–141 μV K<sup>–1</sup>), and high power factor (10–16 × 10<sup>–4</sup> W m<sup>–1</sup> K<sup>–2</sup>) have been achieved
in our Sb<sub>2</sub>Te<sub>3</sub>-nanostructured bulk materials.
The relatively low thermal conductivity (1.32–1.55 W m<sup>–1</sup> K<sup>–1</sup>) is attained in the nanobulk
made of PVP-modified nanoparticles, and values of <i>ZT</i> in the range of 0.24–0.37 are realized at temperatures ranging
from 50 to 200 °C. Our researches set forth a new avenue in promoting
practical applications of Sb<sub>2</sub>Te<sub>3</sub>-based thermoelectric
power generation or cooling devices.