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• W2043286850 abstract "We analyzed and compared two families of intermediate-band materials derived from indium thiospinels: ${text{MgIn}}_{2}{text{S}}_{4}$, having an inverse spinel structure, and ${text{CdIn}}_{2}{text{S}}_{4}$, a direct spinel. First-principles studies of the electronic structures of these two parent semiconductors were carried out to understand the nature of their band gaps. Optical properties were also analyzed and we found good agreement with experiments. As derivatives of these semiconductors, alloys where transition metals ($M=text{Ti}$ and V) substitute for In atoms at octahedral sites are presented as a class of intermediate-band materials. First, the effect of the substitution on structural parameters is assessed. Then, electronic structures are determined for ${text{Mg}}_{2}M{text{In}}_{3}{text{S}}_{8}$ and ${text{Cd}}_{2}M{text{In}}_{3}{text{S}}_{8}$ to show that the ${t}_{2g}$ $d$ states of the transition metal form a partially filled localized band within the band gap of the host semiconductor. The suitability of these compounds as photovoltaic high-efficiency absorbers is discussed. An increase in absorption is assessed by studying the contribution of the transition-metal band toward their optical properties, in the range of higher solar emission, and comparing them with those of the host semiconductors. An analysis of transmittance spectra is carried out to predict the range of optimum thicknesses for samples of this type of thin film absorber. We compare, by means of structural, electronic, and optical behavior, Ti and V as substituents, to evaluate the resulting alloys for potential photovoltaic applications." @default.
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• W2043286850 date "2010-02-09" @default.
• W2043286850 modified "2023-09-30" @default.
• W2043286850 title "Theoretical optoelectronic analysis of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mtext>MgIn</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mtext>S</mml:mtext><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>and<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mtext>CdIn</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mtext>S</mml:…" @default.
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• W2043286850 doi "https://doi.org/10.1103/physrevb.81.075206" @default.
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