Enhanced thermoelectric transport properties of n-type InSe due to the emergence of the flat band by Si doping

2019 ◽  
Vol 6 (6) ◽  
pp. 1475-1481 ◽  
Author(s):  
Kyu Hyoung Lee ◽  
Min-Wook Oh ◽  
Hyun-Sik Kim ◽  
Weon Ho Shin ◽  
Kimoon Lee ◽  
...  
Keyword(s):  
Transport Properties ◽  
Figure Of Merit ◽  
Flat Band ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
Thermoelectric Transport ◽  
Si Doping ◽  
Thermoelectric Transport Properties ◽  
Si Doped

An improved thermoelectric figure of merit (zT) of 0.14 at 795 K was obtained in 7% Si doped InSe due to the emergence of the flat band.

scholarly journals Measuring thermoelectric transport properties of materials

2015 ◽  
Vol 8 (2) ◽  
pp. 423-435 ◽  
Author(s):  
Kasper A. Borup ◽  
Johannes de Boor ◽  
Heng Wang ◽  
Fivos Drymiotis ◽  
Franck Gascoin ◽  
...  
Keyword(s):  
Transport Properties ◽  
Figure Of Merit ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
Thermoelectric Transport ◽  
Thermoelectric Transport Properties ◽  
The Common ◽  
Properties Of Materials

In this review we discuss considerations regarding the common techniques used for measuring thermoelectric transport properties necessary for calculating the thermoelectric figure of merit, zT.

Thermoelectric Transport Properties of SrTiO3 Doped with Pm

2018 ◽  
Vol 280 ◽  
pp. 3-8 ◽  
Author(s):  
A. A. Adewale ◽  
Abdullah Chik ◽  
R. Mohd Zaki ◽  
F. Che Pa ◽  
Yeoh Chow Keat ◽  
...  
Keyword(s):  
Transport Properties ◽  
Figure Of Merit ◽  
Density Functional ◽  
Generalized Gradient ◽  
Thermoelectric Figure ◽  
Functional Theory ◽  
Thermoelectric Transport ◽  
Generalized Gradient Approximation ◽  
High Contribution ◽  
Thermoelectric Transport Properties

Thermoelectric properties of SrTiO3doped with 8%Pm at Sr site were investigated using density functional theory and generalized gradient approximation. The transport properties were calculated based on BoltzTraP code at temperature range 300-1200K. In electronic properties study Fermi level were shifted to conduction band region due to high contribution 4f orbital in Pm. Present study thermoelectric figure of merit ZT result was 0.395 at 300K and 0.638 at 1200K. This shows a considerably good value of ZT for SrTiO3as n-type oxide. Compared to previous work, ZT were at the range of 0.21 - 0.37 for temperature of 300-1000K in Pr, La, Ta and Ho.

Thermoelectric Transport in Superlattices

1997 ◽  
Vol 478 ◽  
Author(s):  
T. L. Reinecke ◽  
D. A. Broido
Keyword(s):  
Exact Solution ◽  
Figure Of Merit ◽  
Phonon Scattering ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
Thermoelectric Transport ◽  
Barrier Layers ◽  
Thermoelectric Transport Properties ◽  
Carrier Tunneling

AbstractThe thermoelectric transport properties of superlattices have been studied using an exact solution of the Boltzmann equation. The role of heat transport along the barrier layers, of carrier tunneling through the barriers, of valley degeneracy and of the well width and energy dependences of the carrier-phonon scattering rates on the thermoelectric figure of merit are given. Calculations are given for Bi2Te3 and for PbTe, and the results of recent experiments are discussed.

Crystal chemistry and thermoelectric transport of layered AM2X2compounds

2018 ◽  
Vol 5 (8) ◽  
pp. 1744-1759 ◽  
Author(s):  
Wanyue Peng ◽  
Sevan Chanakian ◽  
Alexandra Zevalkink
Keyword(s):  
Transport Properties ◽  
Crystal Chemistry ◽  
Figure Of Merit ◽  
Chemical Diversity ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
Thermoelectric Transport

This review highlights the chemical diversity and transport properties of AM2X2Zintl compounds and strategies to achieve a high thermoelectric figure of merit.

Thermoelectric Properties of Semiconducting Intermetallic Compounds: FeGa3and RuGa3

2003 ◽  
Vol 793 ◽  
Author(s):  
Y. Amagai ◽  
A. Yamamoto ◽  
C. H. Lee ◽  
H. Takazawa ◽  
T. Noguchi ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Resistivity ◽  
High Temperature ◽  
Seebeck Coefficient ◽  
Transport Properties ◽  
Figure Of Merit ◽  
Room Temperature ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
High Seebeck Coefficient

ABSTRACTWe report transport properties of polycrystalline TMGa3(TM = Fe and Ru) compounds in the temperature range 313K<T<973K. These compounds exhibit semiconductorlike behavior with relatively high Seebeck coefficient, electrical resistivity, and Hall carrier concentrations at room temperature in the range of 1017- 1018cm−3. Seebeck coefficient measurements reveal that FeGa3isn-type material, while the Seebeck coefficient of RuGa3changes signs rapidly from large positive values to large negative values around 450K. The thermal conductivity of these compounds is estimated to be 3.5Wm−1K−1at room temperature and decreased to 2.5Wm−1K−1for FeGa3and 2.0Wm−1K−1for RuGa3at high temperature. The resulting thermoelectric figure of merit,ZT, at 945K for RuGa3reaches 0.18.

Surface-dominated transport and enhanced thermoelectric figure of merit in topological insulator Bi1.5Sb0.5Te1.7Se1.3

Nanoscale ◽  
2015 ◽  
Vol 7 (2) ◽  
pp. 518-523 ◽  
Author(s):  
Te-Chih Hsiung ◽  
Chung-Yu Mou ◽  
Ting-Kuo Lee ◽  
Yang-Yuan Chen
Keyword(s):  
Topological Insulator ◽  
Figure Of Merit ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
Bulk Specimen ◽  
Thermoelectric Transport ◽  
Transport Measurements

Thermoelectric transport measurements of topological insulator Bi1.5Sb0.5Te1.7Se1.3 nanowires reveal an enhancement of the thermoelectric figure of merit as compared with the bulk specimen.

Regulation of Ge Vacancies through Sm Doping boosting Superior Thermoelectric Performance in GeTe

2022 ◽  
Author(s):  
Tingdong Zhang ◽  
Shuping Deng ◽  
Xiaodie Zhao ◽  
Xuefeng Ruan ◽  
Ning Qi ◽  
...  
Keyword(s):  
Transport Properties ◽  
Thermal Transport ◽  
Figure Of Merit ◽  
Thermoelectric Performance ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
Thermal Transport Properties ◽  
P Type

A high thermoelectric figure of merit ZT of 2.5 at 730 K is achieved in p-type Ge1−xSmxTe through synergetic optimization of electrical and thermal transport properties. Sm doping effectively suppresses...

Thermoelectric Properties of the Half-Heusler Compound (Zr,Hf)(Ni,Pd)Sn

1998 ◽  
Vol 545 ◽  
Author(s):  
V. M. Browning ◽  
S. J. Poon ◽  
T. M. Tritt ◽  
A. L Pope ◽  
S. Bhattacharya ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Transport Properties ◽  
Figure Of Merit ◽  
Phonon Scattering ◽  
Lattice Contribution ◽  
Thermoelectric Transport ◽  
Heusler Compound ◽  
Chemical Substitution ◽  
Seebeck Coefficients ◽  
Thermoelectric Transport Properties

AbstractRecent measurements of the thermoelectric transport properties of a series of the half- Heusler compound ZrNiSn are presented. These materials are known to be bandgap intermetallic compounds with relatively large Seebeck coefficients and semimetallic to semiconducting transport properties. This makes them attractive for study as potential candidates for thermoelectric applications. In this study, trends in the thermoelectric power, electrical conductivity and thermal conductivity are examined as a function of chemical substitution on the various fcc sub-lattices that comprise the half-Heusler crystal structure. These results suggest that the lattice contribution to the thermal conductivity may be reduced by increasing the phonon scattering via chemical substitution. The effects of these substitutions on the overall power factor and figure-of-merit will also be discussed.

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