Phase Composition and Thermoelectric Properties of Materials Based on Cu2 – xSe (0.03 ≤ x ≤ 0.23)

AbstractIndium in Pb1-xSnxTe alloys forms a resonant energy level in the conduction or valence bands, depending on x. In this study we investigate temperature dependence of the In level from 80 to 400K, complementing our previous work at 80 K. Measurements of electrical resistivity, thermopower, Hall and transverse Nernst-Ettinghausen effect are used to assess carrier mobility, Fermi level and scattering coefficient. Measurements are performed on a set of p and n type Pb1-xSnxTe:In with 0 < x < 30 at% and In up to 3 at%. We show that with increasing temperature the Fermi level crosses into the gap. It had been suggested theoretically that hybridization of the In level with one band at the Fermi level could have had a positive effect on the thermoelectric properties of materials, but the present results illustrate the need for temperature-dependent modeling and experimentation.

Download Full-text

Energy calculation of thermoelements witharbitrary temperature dependence of thermoelectric properties of materials by heat balance technique

Energy Conversion ◽

10.1016/0013-7480(71)90108-2 ◽

1971 ◽

Vol 11 (3) ◽

pp. ix

Keyword(s):

Temperature Dependence ◽

Thermoelectric Properties ◽

Heat Balance ◽

Energy Calculation ◽

Balance Technique ◽

Properties Of Materials

Download Full-text

Research Advances of Typical Two Dimensional Layered Thermoelectric Materials

Research and Application of Materials Science ◽

10.33142/rams.v2i2.3166 ◽

2020 ◽

Vol 2 (2) ◽

Author(s):

Haihua HUANG ◽

Xiaofeng FAN

Keyword(s):

Structural Properties ◽

Thermoelectric Properties ◽

Thermoelectric Materials ◽

Electronic Devices ◽

Layered Materials ◽

Two Dimensional ◽

The Past ◽

2D Layered Materials ◽

Potential Applications ◽

Properties Of Materials

Thermoelectric technologies have caught our intense attention due to their ability of heat conversion into electricity. The considerable efforts have been taken to develop and enhance thermoelectric properties of materials over the past several decades. Recently, two-dimensional layered materials are making the promise for potential applications of thermoelectric devices because of the excellent physical and structural properties. Here, a comprehensive coverage about recent progresses in thermoelectric properties of typical two dimensional (2D) layered materials, including the theoretical and experimental results, is provided. Moreover, the potential applications of 2D thermoelectric materials are also involved. These results indicate that the development of 2D thermoelectric materials take a key role in the flexible electronic devices with thermoelectric technologies.

Download Full-text

Ensemble-machine-learning-based correlation analysis of internal and band characteristics of thermoelectric materials

Journal of Materials Chemistry C ◽

10.1039/d0tc02855j ◽

2020 ◽

Vol 8 (37) ◽

pp. 13079-13089

Author(s):

Lihao Chen ◽

Ben Xu ◽

Jia Chen ◽

Ke Bi ◽

Changjiao Li ◽

...

Keyword(s):

Machine Learning ◽

Electrical Conductivity ◽

Correlation Analysis ◽

Seebeck Coefficient ◽

Thermoelectric Properties ◽

Thermoelectric Materials ◽

Ensemble Machine Learning ◽

Properties Of Materials

Machine learning can significantly help to predict the thermoelectric properties of materials, such as the Seebeck coefficient and electrical conductivity.

Download Full-text

Thermoelectric properties of germanium telluride with fine-grained structure

Perspektivnye Materialy ◽

10.30791/1028-978x-2020-11-15-25 ◽

2020 ◽

Vol 11 ◽

pp. 15-25

Author(s):

L. D. Ivanova ◽

◽

Yu. V. Granatkina ◽

I. Yu. Nikhezina ◽

A. G. Malchev ◽

...

Keyword(s):

Thermoelectric Properties ◽

Melt Spinning ◽

High Energy ◽

Grain Structure ◽

Thermoelectric Efficiency ◽

Fine Grained ◽

Germanium Telluride ◽

Fine Grained Structure ◽

Properties Of Materials ◽

P Type

The microstructure and thermoelectric properties of materials based on germanium telluride p-type conductivity doped with copper and bismuth obtained by hot pressing of three types powders prepared by grinding an ingot to a size of hundreds microns (0.315  mm) to hundreds of nanometers (mechanical activation) in planetary high-energy mill and melt spinning were investigated. The microstructure of the samples were analyzed by optical and electron scanning microscopies. The nanoscale grain structure of these samples was established. The thermoelectric characteristics of the materials: Seebeck coefficient, electrical and thermal conductivities, were measured both at room temperature and in the temperature range of 100 – 800 K. The slopes of these dependencies are estimated. The coefficient of thermoelectric figure of merit is calculated. The higher thermoelectric efficiency (ZT = 1.5 at 600 K) was received for the samples hot-pressed from granules, prepared by melt spinning.

Download Full-text