Kramers–Kronig Relations for the Dielectric Permittivity of the Coulomb System with a Single-Species Bose–Einstein Condensate

Бобров, В. Б.; Trigger, S. A.

doi:10.1007/s10909-020-02473-8

Cited by 2 publications

(1 citation statement)

References 40 publications

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“…The Monk Horst‐Pack is particularly important for convergence, and accuracy is adjusted as 20 × 20 × 20 for optical and electronic properties, while for thermoelectric properties it increased to 30 × 30 × because denser k‐mesh is required. The bandgap‐dependent optical properties have been explored by Kramer‐Kronge relation 35 and the corresponding real ε 1 (ω), and imaginary ε 2 (ω) parts of dielectric constant are formulated as

ε_{1} ((), ω) = 1 + \frac{2}{π} P \int_{0}^{\infty} \frac{ω^{'} ε_{2} ((), ω^{'})}{{ω^{'}}^{2} - ω^{2}} d ω^{'},

ε_{2} ((), ω) = \frac{e^{2} h'}{π m^{2} ω^{2}} \sum_{v, c} \int_{BZ}^{\infty} {|M_{italiccv} (k)|}^{2} δ ([], ω_{cv} ((), k) - ω) d^{3} k .

…”

Section: Methodsmentioning

confidence: 99%

New lead‐free double perovskites X ₂ GeI ₆ (X = K, Rb, Cs) for solar cells, and renewable energy as an alternate of hybrid perovskites

et al. 2021

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Summary Recently, the unique double perovskites are continuously being used for solar cells and thermoelectric applications because of stable structures and high energy conversion efficiency. We addressed the optical and transport characteristics of X2GeI6 (X = K, Rb, Cs) by first‐principle calculations. The tolerance factor confirms the structural stability. The computed band gaps 1.27 eV (K2GeI6), 1.24 eV (Rb2GeI6), and 1.13 eV (Cs2GeI6) plunge the maximum absorption in visible light zone. The first absorption bands 459 to 826 nm for K2GeI6, 477 to 885 nm for Rb2GeI6, and 653 to 992 nm for Cs2GeI6 are outstanding for visible light solar cells. While the second absorption bands are for other optoelectronic devices like surgical equipment. The optical characteristics are debated by frequency‐dependent dielectric constants (ε1, ε2), refractive index, and absorption coefficient. Thermoelectric performance is evaluated by large values of power factor and ultralow values of thermal conductivity for both n‐ and p‐type of charge carriers. Highlights An alternative of organic‐inorganic and Pb based perovskites Ideal band gaps 1.27 eV, 1.24 eV, and 1.13 eV of K2GeI6, Rb2GeI6, and Cs2GeI6 for solar cells Absorption in the visible region increases their potential for solar cells. Observation of ultralow lattice thermal conductivity.

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ε_{1} ((), ω) = 1 + \frac{2}{π} P \int_{0}^{\infty} \frac{ω^{'} ε_{2} ((), ω^{'})}{{ω^{'}}^{2} - ω^{2}} d ω^{'},

ε_{2} ((), ω) = \frac{e^{2} h'}{π m^{2} ω^{2}} \sum_{v, c} \int_{BZ}^{\infty} {|M_{italiccv} (k)|}^{2} δ ([], ω_{cv} ((), k) - ω) d^{3} k .

…”

Section: Methodsmentioning

confidence: 99%

New lead‐free double perovskites X ₂ GeI ₆ (X = K, Rb, Cs) for solar cells, and renewable energy as an alternate of hybrid perovskites

et al. 2021

View full text Add to dashboard Cite

show abstract

Abinitio study of alkali-metal-based bismuth selenides ( ABiSe2 ;
Abolade,
Akinpelu,
Obada
et al. 2024
Phys. Rev. Materials

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Kramers–Kronig Relations for the Dielectric Permittivity of the Coulomb System with a Single-Species Bose–Einstein Condensate

Cited by 2 publications

References 40 publications

New lead‐free double perovskites X ₂ GeI ₆ (X = K, Rb, Cs) for solar cells, and renewable energy as an alternate of hybrid perovskites

New lead‐free double perovskites X ₂ GeI ₆ (X = K, Rb, Cs) for solar cells, and renewable energy as an alternate of hybrid perovskites

Abinitio study of alkali-metal-based bismuth selenides ( ABiSe2 ;
Abolade,
Akinpelu,
Obada
et al. 2024
Phys. Rev. Materials

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Kramers–Kronig Relations for the Dielectric Permittivity of the Coulomb System with a Single-Species Bose–Einstein Condensate

Cited by 2 publications

References 40 publications

New lead‐free double perovskites X 2 GeI 6 (X = K, Rb, Cs) for solar cells, and renewable energy as an alternate of hybrid perovskites

New lead‐free double perovskites X 2 GeI 6 (X = K, Rb, Cs) for solar cells, and renewable energy as an alternate of hybrid perovskites

Abinitio study of alkali-metal-based bismuth selenides ( ABiSe2 ; Abolade, Akinpelu, Obada et al. 2024Phys. Rev. Materials

Contact Info

Product

Resources

About

New lead‐free double perovskites X ₂ GeI ₆ (X = K, Rb, Cs) for solar cells, and renewable energy as an alternate of hybrid perovskites

New lead‐free double perovskites X ₂ GeI ₆ (X = K, Rb, Cs) for solar cells, and renewable energy as an alternate of hybrid perovskites

Abinitio study of alkali-metal-based bismuth selenides ( ABiSe2 ;
Abolade,
Akinpelu,
Obada
et al. 2024
Phys. Rev. Materials