DFT investigation of structural, elastic, electronic, thermodynamic and optical properties of KCuZ (Z= Te, Se) solar absorbers

Madallah, Yusuf; Felix, O. Saouma; George, S. Manyali; Job, W. Wafula; Odanga, Huxley

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dc.contributor.author	Madallah, Yusuf
dc.contributor.author	Felix, O. Saouma
dc.contributor.author	George, S. Manyali
dc.contributor.author	Job, W. Wafula
dc.contributor.author	Odanga, Huxley
dc.date.accessioned	2023-10-13T07:47:18Z
dc.date.available	2023-10-13T07:47:18Z
dc.date.issued	2023
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dc.identifier.uri	http://erepository.kafuco.ac.ke/123456789/223
dc.description.abstract	In this study, we have investigated the electronic , structural, elastic, optical and thermodynamic properties of the copper-based ternary semiconductors, that is, KCuZ (Z= Te, Se). The properties of these materials have been precisely determined based on first-principle calculations. The lattice constants, bulk modulus and equilibrium total energies were obtained from Murnaghan equation of state and have a good agreement with other theoretical and experimental methods. The absorption spectra was analyzed to determine the active window of electromagnetic spectrum of the compounds. The elastic constants of these materials were elucidated and hence provided vital information about the material’s ability to withstand external stress. The results indicate that the materials conform to the stability criteria with brittle behavior and anisotropic nature in the HCP structure. The electronic band structures and density of states were computed and the results obtained suggests that the these materials have a band gap of 1.25 eV and 1.1 eV for KCuTe and KCuSe respectively and therefore they are suitable for photovoltaic applications. The materials are also found to posses desirable optical properties i.e. the materials have a good optical absorption since highest absorption peaks occur within the UV region, small reflectivity and high dielectric constant indicating that the materials is suitable for use as solar absorbers.	en_US
dc.language.iso	en	en_US
dc.publisher	Solid State Communications	en_US
dc.subject	DFT KCuTe HCP	en_US
dc.title	DFT investigation of structural, elastic, electronic, thermodynamic and optical properties of KCuZ (Z= Te, Se) solar absorbers	en_US
dc.type	Preprint	en_US