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Published in: Optical and Quantum Electronics 11/2023

01-11-2023

Insight into the spin-polarized structural, optoelectronic, magnetic, thermodynamic, and thermoelectric properties of PdBO2 (B = Al, Cr, and Rh) Delafossite semiconductor

Authors: Mohammed Elamin Ketfi, Saber Saad Essaoud, Said Al Azar, Anas Y. Al-Reyahi, Ahmad A. Mousa, Ahmad Mufleh

Published in: Optical and Quantum Electronics | Issue 11/2023

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Abstract

In this work, we performed first-principles calculations based on density functional theory and the semi-classical Boltzmann method to investigate the structural, optoelectronic, magnetic, thermodynamic and thermoelectric properties of PdAlO2, PdCrO2 and PdRhO2 in the Tetragonal phase. Our calculations have revealed that these three compounds have indirect band gaps in the range of 2.14 to 2.68 eV. The thermodynamic properties are investigated using the quasi-harmonic model, where heat capacities at constant pressure and volume, entropy, Debye temperature, and thermal expansion coefficient are analyzed and discussed under both pressure and temperature effects. As a result of this study, PdAlO2, PdCrO2, and PdRhO2 are promising materials for optoelectronic devices, especially photovoltaic materials in solar cells. In doing so, we computed for each compound the Seebeck coefficient, electrical conductivity, electronic thermal conductivity, and figure of merit in the temperature range from 300 to 500 K. The relaxation time and lattice thermal conductivity are calculated as well. Our results reveal that low thermal conductivity and a high Seebeck coefficient can be achieved at the same time. In addition, they exhibit a higher Seebeck for PdAlO2 compared to PdBO2 (B = Cr and Rh) up to 1.6 mV/K for PdAlO2 at 300 K. Thereby improving their thermoelectric performance which makes them attractive thermoelectric materials at high temperatures.

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Metadata
Title
Insight into the spin-polarized structural, optoelectronic, magnetic, thermodynamic, and thermoelectric properties of PdBO2 (B = Al, Cr, and Rh) Delafossite semiconductor
Authors
Mohammed Elamin Ketfi
Saber Saad Essaoud
Said Al Azar
Anas Y. Al-Reyahi
Ahmad A. Mousa
Ahmad Mufleh
Publication date
01-11-2023
Publisher
Springer US
Published in
Optical and Quantum Electronics / Issue 11/2023
Print ISSN: 0306-8919
Electronic ISSN: 1572-817X
DOI
https://doi.org/10.1007/s11082-023-05259-w

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