Core–shell nanostructures introduce multiple potential barriers to enhance energy filtering for the improvement of the thermoelectric properties of SnTe

Nanoscale ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 1904-1911 ◽  
Author(s):  
Zheng Ma ◽  
Chao Wang ◽  
Jingdan Lei ◽  
De Zhang ◽  
Yanqun Chen ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Core Shell ◽  
Potential Barriers ◽  
Energy Filtering ◽  
Shell Nanostructures ◽  
Filtering Effect

BiCuSeO@SnO2 core-shell nanostructures can introduce multiple potential barriers in SnTe to enhance energy filtering effect.

One-pot fabrication and thermoelectric properties of Ag2Te–polyaniline core–shell nanostructures

2012 ◽  
Vol 133 (2-3) ◽  
pp. 808-812 ◽  
Author(s):  
Y.Y. Wang ◽  
K.F. Cai ◽  
J.L. Yin ◽  
Y. Du ◽  
X. Yao
Keyword(s):  
Thermoelectric Properties ◽  
Core Shell ◽  
One Pot ◽  
Shell Nanostructures

Effect of crystal size distribution on thermoelectric performance for Lanthanum-doped strontium titanate bulk material

2015 ◽  
Vol 08 (06) ◽  
pp. 1550070
Author(s):  
Boyu Zhang ◽  
Jun Wang ◽  
Xinba Yaer ◽  
Zhenzhen Huo ◽  
Yin Wu ◽  
...  
Keyword(s):  
Size Distribution ◽  
Strontium Titanate ◽  
Crystal Size ◽  
Bulk Material ◽  
Crystal Size Distribution ◽  
Thermoelectric Performance ◽  
Potential Barriers ◽  
Seebeck Coefficients ◽  
Energy Filtering ◽  
Filtering Effect

Effect of crystal size distribution on thermoelectric performance of Lanthanum-doped strontium titanate ( La - SrTiO 3) ceramics are investigated in this study. Thermoelectric performance measurement, coupled with microstructure studies, shows that the electrical conductivity strongly depends on the crystal size, potential barrier on the grain boundary and porosity. Meantime, because the average potential barriers height are increased along with the reduction of crystal size, the Seebeck coefficients are increased by energy filtering effect at the large number of grain boundaries. As a result, by controlling of crystal size distribution, ZT value of La - SrTiO 3 is improved.

scholarly journals Thermoelectric Properties of Lead Chalcogenide Core–Shell Nanostructures

ACS Nano ◽  
2011 ◽  
Vol 5 (11) ◽  
pp. 8541-8551 ◽  
Author(s):  
Marcus Scheele ◽  
Niels Oeschler ◽  
Igor Veremchuk ◽  
Sven-Ole Peters ◽  
Alexander Littig ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Core Shell ◽  
Lead Chalcogenide ◽  
Shell Nanostructures

Enhancing the thermoelectric properties of SnTe via introducing PbTe@C core–shell nanostructures

2021 ◽  
Author(s):  
Jingwen Zhang ◽  
song li ◽  
zhengyi zhu ◽  
Zhenwang Wu ◽  
Jiuxing Zhang
Keyword(s):  
Thermal Conductivity ◽  
Seebeck Coefficient ◽  
Thermoelectric Properties ◽  
Hole Concentration ◽  
High Thermal Conductivity ◽  
Concentration Limit ◽  
Core Shell ◽  
Metal Chalcogenides ◽  
Shell Nanostructures ◽  
High Hole Concentration

SnTe is an emerging IV–VI metal chalcogenides, but its low Seebeck coefficient and high thermal conductivity mainly originating from the high hole concentration limit its thermoelectric performance. In this work,...

Enhancement of Thermoelectric Properties of n-Type Bi2Te3–xSex by Energy Filtering Effect

2021 ◽  
Author(s):  
Yuhei Kawajiri ◽  
Sora-at Tanusilp ◽  
Masaya Kumagai ◽  
Manabu Ishimaru ◽  
Yuji Ohishi ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Energy Filtering ◽  
Filtering Effect

Improvements of Thermoelectric Performances in AgSbTe2 System With in-situ Ag2Te Nano-Precipitations

2010 ◽  
Vol 1267 ◽  
Author(s):  
Shengnan Zhang ◽  
Shenghui Yang ◽  
Guangyu Jiang ◽  
Junjie Shen ◽  
Tiejun Zhu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
State Of The Art ◽  
Critical Component ◽  
Energy Filtering ◽  
Transmission Electron ◽  
Filtering Effect ◽  
The Relationship

AbstractAgSbTe2 is the critical component in both LAST-m and TAGS-x system, which are two state-of-the-art mid-temperature thermoelectric bulk nanocomposites. By adjusting the Ag2Te/Sb2Te3 ratio, Sb2Te3 and Ag2Te precipitated samples were obtained with x = 0.68 to 0.74 and x = 0.84 to 0.90 (x as in (Ag2Te)x/2(Sb2Te3)1-x/2), respectively. The single phased AgSbTe2 was obtained with the x value of 0.78 and 0.81, which is consistent of the previous results on the phase diagram of (Ag2Te)x(Sb2Te3)1-x system. Comparing the effect of the two different precipitates, Ag2Te are much effective for the improvements of thermoelectric properties in AgSbTe2 nanocomposites. Utilizing the high-resolution transmission electron microscopy, Ag2Te was observed as nanodots and nano-lamellae embedded in the AgSbTe2 matrix, which can be related to the energy filtering effect for the increase of Seebeck coefficient. The relationship among the composition, microstructure and thermoelectric properties was systematically studied. It can be noticed that the thermoelectric properties of AgSbTe2 system are very sensitive to the composition, especially at low temperature. The maximum figure of merit ZT value of 1.53 was obtained at 500 K for Ag0.84Sb1.16Te2.16 with 40% increase comparing with the single phased sample.

Sign in / Sign up

Export Citation Format

Share Document