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Ali M, Khalil RMA, Hussain MI, Hussain F. Exploration of the structural, optoelectronic, magnetic, elastic, vibrational, and thermodynamic properties of molybdenum-based chalcogenides A 2MoSe 4 (A =Li, K) for photovoltaics and spintronics applications: a first-principle study. J Mol Model 2023; 29:347. [PMID: 37872270 DOI: 10.1007/s00894-023-05751-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 10/09/2023] [Indexed: 10/25/2023]
Abstract
CONTEXT In the present work, the cubic phase of the chalcogenide materials, i.e., A2MoSe4 (A =Li, K) is examined to explore the structural, optoelectronic, magnetic, mechanical, vibrational, and thermodynamic properties. The lattice parameters for Li2MoSe4 are found to be a= 7.62 Å with lattice angles of α=β=γ=90° whereas for K2MoSe4, a= 8.43 Å, and α=β=γ=90°. These materials are categorized as semiconductors because Li2MoSe4 and K2MoSe4 exhibit direct energy band gap worth 1.32 eV and 1.61 eV, respectively through HSE06 functional. The optical analysis has declared them efficient materials for optoelectronic applications because both materials are found to be effective absorbers of ultraviolet radiations. These materials are noticed to be brittle while possessing anisotropic behavior for various mechanical applications. The vibrational properties are explored to check the thermal stability of the materials. On the basis of thermodynamics and heat capacity response, Li2MoSe4 is more stable than K2MoSe4. The results of our study lay the groundwork for future research on the physical characteristics of ternary transition metal chalcogenides (TMC). METHODS These physical properties are explored for the first time while using a first-principles approach based on density functional theory (DFT) in the framework of Cambridge Serial Total Energy Package (CASTEP) by Perdew-Burke-Ernzerhof generalized gradient approximation (PBE-GGA) functional. However, GGA+U and HSE06 are also employed to improve electronic properties. Kramers-Kronig relations are used to evaluate the dielectric function with a smearing value of 0.5 eV. Voigt-Reuss-Hill approximation is used for seeking the elastic response of these materials. The thermodynamic response is sought by harmonic approximation. The density functional perturbation theory (DFPT) approach is used for investigating atomic vibrations.
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Affiliation(s)
- Muhammad Ali
- Materials Simulation Research Laboratory (MSRL), Department of Physics, Bahauddin Zakariya University, Multan, 60800, Pakistan
| | - R M Arif Khalil
- Materials Simulation Research Laboratory (MSRL), Department of Physics, Bahauddin Zakariya University, Multan, 60800, Pakistan
| | | | - Fayyaz Hussain
- Materials Simulation Research Laboratory (MSRL), Department of Physics, Bahauddin Zakariya University, Multan, 60800, Pakistan
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Trump BA, McQueen TM. Structure, properties, and disorder in the new distorted-Hollandite PbIr4Se8. J SOLID STATE CHEM 2016. [DOI: 10.1016/j.jssc.2016.07.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kuhn A, Schoop LM, Eger R, Moudrakovski I, Schwarzmüller S, Duppel V, Kremer RK, Oeckler O, Lotsch BV. Copper Selenidophosphates Cu4P2Se6, Cu4P3Se4, Cu4P4Se3, and CuP2Se, Featuring Zero-, One-, and Two-Dimensional Anions. Inorg Chem 2016; 55:8031-40. [PMID: 27447868 DOI: 10.1021/acs.inorgchem.6b01161] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Five new compounds in the Cu/P/Se phase diagram have been synthesized, and their crystal structures have been determined. The crystal structures of these compounds comprise four previously unreported zero-, one-, and two-dimensional selenidophosphate anions containing low-valent phosphorus. In addition to two new modifications of Cu4P2Se6 featuring the well-known hexaselenidohypodiphosphate(IV) ion, there are three copper selenidophosphates with low-valent P: Cu4P3Se4 contains two different new anions, (i) a monomeric (zero-dimensional) selenidophosphate anion [P2Se4](4-) and (ii) a one-dimensional selenidophosphate anion [Formula: see text], which is related to the well-known gray-Se-like [Formula: see text] Zintl anion. Cu4P4Se3 contains one-dimensional [Formula: see text] polyanions, whereas CuP2Se contains the 2D selenidophosphate [Formula: see text] polyanion. It consists of charge-neutral CuP2Se layers separated by a van der Waals gap which is very rare for a Zintl-type phase. Hence, besides black P, CuP2Se constitutes a new possible source of 2D oxidized phosphorus containing layers for intercalation or exfoliation experiments. Additionally, the electronic structures and some fundamental physical properties of the new compounds are reported. All compounds are semiconducting with indirect band gaps of the orders of around 1 eV. The phases reported here add to the structural diversity of chalcogenido phosphates. The structural variety of this family of compounds may translate into a variety of tunable physical properties.
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Affiliation(s)
- Alexander Kuhn
- Max Planck Institute for Solid State Research , Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Leslie M Schoop
- Max Planck Institute for Solid State Research , Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Roland Eger
- Max Planck Institute for Solid State Research , Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Igor Moudrakovski
- Max Planck Institute for Solid State Research , Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Stefan Schwarzmüller
- Institute for Mineralogy, Crystallography and Materials Science, Leipzig University , Scharnhorststraße 20, 04275 Leipzig, Germany
| | - Viola Duppel
- Max Planck Institute for Solid State Research , Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Reinhard K Kremer
- Max Planck Institute for Solid State Research , Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Oliver Oeckler
- Institute for Mineralogy, Crystallography and Materials Science, Leipzig University , Scharnhorststraße 20, 04275 Leipzig, Germany
| | - Bettina V Lotsch
- Max Planck Institute for Solid State Research , Heisenbergstraße 1, 70569 Stuttgart, Germany.,Department of Chemistry, Ludwig-Maximilians-Universität München , Butenandtstraße 5-13, 81377 München, Germany.,Nanosystems Initiative Munich (NIM) & Center for Nanoscience , Schellingstraße 4, 80799 München, Germany
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