scholarly journals Crystal Structure and Thermoelectric Transport Properties of As-Doped Layered Pnictogen Oxyselenides NdO0.8F0.2Sb1−xAsxSe2

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2164
Author(s):  
Kota Morino ◽  
Yosuke Goto ◽  
Akira Miura ◽  
Chikako Moriyoshi ◽  
Yoshihiro Kuroiwa ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Conductivity ◽  
Transport Properties ◽  
High Performance ◽  
Lattice Parameter ◽  
First Principles Calculation ◽  
X Ray Diffraction ◽  
Thermoelectric Transport ◽  
Thermoelectric Transport Properties ◽  
Axis Length

We report the synthesis and thermoelectric transport properties of As-doped layered pnictogen oxyselenides NdO0.8F0.2Sb1−xAsxSe2 (x ≤ 0.6), which are predicted to show high-performance thermoelectric properties based on first-principles calculation. The crystal structure of these compounds belongs to the tetragonal P4/nmm space group (No. 129) at room temperature. The lattice parameter c decreases with increasing x, while a remains almost unchanged among the samples. Despite isovalent substitution of As for Sb, electrical resistivity significantly rises with increasing x. Very low thermal conductivity of less than 0.8 Wm−1K−1 is observed at temperatures between 300 and 673 K for all the examined samples. For As-doped samples, the thermal conductivity further decreases above 600 K. Temperature-dependent synchrotron X-ray diffraction indicates that an anomaly also occurs in the c-axis length at around 600 K, which may relate to the thermal transport properties.

Effect of doping indium into a Bi2Te3 matrix on the microstructure and thermoelectric transport properties

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 60736-60740 ◽  
Author(s):  
Xin Guo ◽  
Jieming Qin ◽  
Xiaoling Lv ◽  
Le Deng ◽  
Xiaopeng Jia ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Transport Properties ◽  
Lattice Thermal Conductivity ◽  
Textural Features ◽  
Thermoelectric Transport ◽  
Thermoelectric Transport Properties ◽  
Effect Of Doping

Doping In into a Bi2Te3 matrix can significantly transform textural features and decrease the lattice thermal conductivity.

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.

Correlation between thermoelectric transport properties and crystal structure in two-dimensional CrSiTe3

2019 ◽  
Vol 790 ◽  
pp. 93-98
Author(s):  
Kyu Hyoung Lee ◽  
Ho Sung Yu ◽  
Sang-Il Kim ◽  
Seung Pil Moon ◽  
Jae-Yeol Hwang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Transport Properties ◽  
Two Dimensional ◽  
Thermoelectric Transport ◽  
Thermoelectric Transport Properties

scholarly journals Highly Textured N-Type SnSe Polycrystals with Enhanced Thermoelectric Performance

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Peng-Peng Shang ◽  
Jinfeng Dong ◽  
Jun Pei ◽  
Fu-Hua Sun ◽  
Yu Pan ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Transport Properties ◽  
Electrical Transport ◽  
High Performance ◽  
Waste Heat ◽  
Thermoelectric Performance ◽  
Electrical Transport Properties ◽  
Anisotropic Thermal Conductivity ◽  
Out Of Plane ◽  
Thermoelectric Transport Properties

Thermoelectric materials, which directly convert heat into electricity based on the Seebeck effects, have long been investigated for use in semiconductor refrigeration or waste heat recovery. Among them, SnSe has attracted significant attention due to its promising performance in both p-type and n-type crystals; in particular, a higher out-of-plane ZT value could be achieved in n-type SnSe due to its 3D charge and 2D phonon transports. In this work, the thermoelectric transport properties of n-type polycrystalline SnSe were investigated with an emphasis on the out-of-plane transport through producing textural microstructure. The textures were fabricated using mechanical alloying and repeated spark plasma sintering (SPS), as a kind of hot pressing, aimed at producing strong anisotropic transports in n-type polycrystalline SnSe as that in crystalline SnSe. Results show that the lowest thermal conductivity of 0.36 Wm-1 K-1 was obtained at 783 K in perpendicular to texture direction. Interestingly, the electrical transport properties are less anisotropic and even nearly isotropic, and the power factors reach 681.3 μWm-1 K-2 at 783 K along both parallel and perpendicular directions. The combination of large isotropic power factor and low anisotropic thermal conductivity leads to a maximum ZT of 1.5 at 783 K. The high performance elucidates the outstanding electrical and thermal transport behaviors in n-type polycrystalline SnSe, and a higher thermoelectric performance can be expected with future optimizing texture in n-type polycrystalline SnSe.

A first-principles study of the thermoelectric properties of rhombohedral GeSe

2020 ◽  
Vol 22 (4) ◽  
pp. 1911-1922
Author(s):  
Kunpeng Yuan ◽  
Zhehao Sun ◽  
Xiaoliang Zhang ◽  
Xiaojing Gong ◽  
Dawei Tang
Keyword(s):  
Transport Properties ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
First Principles ◽  
High Performance ◽  
First Principles Calculations ◽  
Thermoelectric Transport ◽  
First Principles Study ◽  
Thermoelectric Transport Properties ◽  
P Type

This work offers insights into the thermoelectric transport properties in rhombohedral GeSe by first-principles calculations and demonstrates that both p-type and n-type GeSe are potential high-performance thermoelectric materials.

Preparation and thermoelectric transport properties of high-performance p-type Bi2Te3 with layered nanostructure

2007 ◽  
Vol 90 (1) ◽  
pp. 012102 ◽  
Author(s):  
Xinfeng Tang ◽  
Wenjie Xie ◽  
Han Li ◽  
Wenyu Zhao ◽  
Qingjie Zhang ◽  
...  
Keyword(s):  
Transport Properties ◽  
High Performance ◽  
Thermoelectric Transport ◽  
Thermoelectric Transport Properties ◽  
P Type

Thermoelectric Transport Properties of n-Type Tin Sulfide

2019 ◽  
Author(s):  
Xuegao Hu ◽  
Wenke He ◽  
Dongyang Wang ◽  
Zhiwei Huang ◽  
Li-Dong Zhao
Keyword(s):  
Transport Properties ◽  
Tin Sulfide ◽  
Thermoelectric Transport ◽  
Thermoelectric Transport Properties
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