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Structural, electro...
Structural, electronic and optical properties of silver delafossite oxides : A first-principles study with hybrid functional
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- Kumar, Mukesh (författare)
- KTH,Materialvetenskap
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- Persson, Clas (författare)
- KTH,Materialvetenskap,Flerskalig materialmodellering
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(creator_code:org_t)
- Elsevier, 2013
- 2013
- Engelska.
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Ingår i: Physica. B, Condensed matter. - : Elsevier. - 0921-4526 .- 1873-2135. ; 422, s. 20-27
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Ternary delafossite compounds are potential materials for optoelectronic devices. Employing a first-principles method, we calculate the structural, electronic, and optical properties of the silver based compounds AgMO2 (M=Al, Ga or In), which crystallize in delafossite structure. Our calculations show that these AgMO2 oxides have indirect band gaps and the gap energies are in the region of 1.6-3.0 eV whereas, the lowest direct band gap energies are estimated in the range of 2.6-4.3 eV. Furthermore, we find that AgMO2 compounds exhibit a strong anisotropy for the dielectric function and absorption spectra. The absorption onset for these compounds occurs well above the band gap energies. Overall, we show that the hybrid functional improves the lattice parameters and band gap energies and the calculated values are in good agreement with the experimental values.
Ämnesord
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Nyckelord
- Transparent conductor
- Electronic structure
- Silver delafossites
- Density functional theory
- Hybrid functional
- Optical properties
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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