Crystal structure, electronic band structure and high-temperature thermoelectric properties of Te-substituted tetrahedrites Cu12Sb4−xTexS13 (0.5 ≤ x ≤ 2.0)

2015 ◽  
Vol 3 (40) ◽  
pp. 10476-10487 ◽  
Author(s):  
Y. Bouyrie ◽  
C. Candolfi ◽  
V. Ohorodniichuk ◽  
B. Malaman ◽  
A. Dauscher ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Stability ◽  
High Temperature ◽  
Band Structure ◽  
Thermoelectric Properties ◽  
Electronic Band Structure ◽  
Electronic Band ◽  
Synthesis Routes

The crystal structure, thermal stability and high-temperature thermoelectric properties of two series of tetrahedrites prepared by different synthesis routes are reported underlining the importance of off-stoichiometry in this family of compounds.

Tetrahedrites as thermoelectric materials: an overview

2015 ◽  
Vol 3 (48) ◽  
pp. 12364-12378 ◽  
Author(s):  
R. Chetty ◽  
A. Bali ◽  
R. C. Mallik
Keyword(s):  
Crystal Structure ◽  
Band Structure ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
Chemical Bonding ◽  
Electronic Band Structure ◽  
Electronic Band

This review discusses about the crystal structure, chemical bonding, and the electronic band structure of tetrahedrite materials. Also, this review outlines the effect of different doping elements on the thermoelectric properties of tetrahedrite materials.

The crystal structure of the high-temperature polymorph of α–hexathienyl (α–6T/HT)

1995 ◽  
Vol 10 (9) ◽  
pp. 2170-2173 ◽  
Author(s):  
T. Siegrist ◽  
R.M. Fleming ◽  
R.C. Haddon ◽  
R.A. Laudise ◽  
A.J. Lovinger ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Band Structure ◽  
Electronic Band Structure ◽  
Structural Information ◽  
Thin Film Transistor ◽  
Crystal Structure Analysis ◽  
Organic Superconductors ◽  
Electronic Band ◽  
High Temperature Polymorph

α-hexathienyl (α–6T) is a highly promising material for application in thin film transistor devices. Recently, record high mobilities, together with record high current on/off ratios, have been reported.1 Thus far, structural information on this exciting material is sketchy. The crystal structures of several such hexamers have been investigated, but only with powder samples, since the crystal growth has proven exceedingly difficult.2-5 Powder Rietveld refinements on these materials are severely hampered by the large number of overlapping reflections, preferred orientation, ambiguities in symmetry, etc. Here, we present a crystal structure of the high-temperature polymorph of α–6T (α–6T/HT), as determined from a single-crystal structure analysis. In this polymorph, the hexamer crystallizes in the smallest unit cell so far reported for this material, but the molecule is flat. Extended Hückel theory (EHT) band structure calculations show that α–6T/HT is an indirect gap semiconductor, with the conduction band minimum at Y and the valence band maximum at Γ. The conduction and valence bands both show a remarkable degree of dispersion along X and Y for a molecular crystal. The electronic band structure of this material is strikingly similar to that of the two-dimensional organic superconductors based on bis(ethylenedithio)tetrathiafulvalene (ET), such as κ−(ET)2 Cu(NCS)2.

Defect chemistry and enhancement of thermoelectric performance in Ag-doped Sn1+δ−xAgxTe

2017 ◽  
Vol 5 (5) ◽  
pp. 2235-2242 ◽  
Author(s):  
Min Ho Lee ◽  
Do-Gyun Byeon ◽  
Jong-Soo Rhyee ◽  
Byungki Ryu
Keyword(s):  
Band Structure ◽  
Thermoelectric Properties ◽  
Electronic Band Structure ◽  
Defect Chemistry ◽  
Structure Calculation ◽  
Thermoelectric Performance ◽  
Band Structure Calculation ◽  
Electronic Band

We investigated the thermoelectric properties and electronic band structure calculation of Sn1−xAgxTe and Sn1.03−xAgxTe (x = 1, 3, 5, 7 mol%) compounds.

Remarkable electronic band structure leads to high thermoelectric properties in p-type γ-Cu2S

Vacuum ◽  
2019 ◽  
Vol 170 ◽  
pp. 108964
Author(s):  
Yangfan Cui ◽  
Shuai Duan ◽  
Xin Chen ◽  
Xiaobing Liu
Keyword(s):  
Band Structure ◽  
Thermoelectric Properties ◽  
Electronic Band Structure ◽  
Electronic Band ◽  
P Type

scholarly journals Large improvement in thermoelectric performance of pressure-tuned Mg3Sb2

RSC Advances ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 1149-1156
Author(s):  
Juan Li ◽  
Shuai Zhang ◽  
Kai Han ◽  
Bing Sun ◽  
Lianzhen Cao
Keyword(s):  
Band Structure ◽  
Thermoelectric Properties ◽  
Electronic Band Structure ◽  
Thermoelectric Performance ◽  
Electronic Band ◽  
Pressure Tuning ◽  
Large Improvement

Because of the modified electronic band structure, the thermoelectric properties of Mg3Sb2 can be improved by pressure tuning.

Sign in / Sign up

Export Citation Format

Share Document