Experimental observation of valence band dispersion and increased hole conductivity in CuCr1-xLixO2-ySy

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F21%3A00124295" target="_blank" >RIV/00216224:14740/21:00124295 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1567173921000110?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1567173921000110?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.cap.2021.01.001" target="_blank" >10.1016/j.cap.2021.01.001</a>

Result language
angličtina
Original language name
Experimental observation of valence band dispersion and increased hole conductivity in CuCr1-xLixO2-ySy
Original language description
Delafossite compounds are layered ternary oxides known for simultaneous exhibition of significant carrier conduction and optical transparency. To survey effect of simultaneous cationic and anionic hole doping in prototype delafossite CuCrO2, we have analyzed the structural, optical, impedance and transport mechanism of CuCr1-xLixO2-ySy (x and y ranging 0-2 atomic %) prepared by solid state heating. The substitutional site occupancy of Li??Cr and S-O are confirmed and quantified by Rietveld analysis. Valence band dispersion is demonstrated upon Li-Cr center dot center dot and S-O(x) co-doping by x-ray photoelectron spectroscopy with extended contribution from shallow S 3p antibonding states. From diffuse reflectance spectra, the optical gap (similar to 3.5 eV) is evaluated to be wide even upon co-doping. Carrier density and hole mobility for CCO/(Li-Cr center dot center dot +S-O(x)) to be 5.32 +/- 10(15) cm(-3) and 23.50 cm(2)V(-1)s(-1), respectively. This scheme of band engineering is indicative of a more persuasive alternative to reach the hole conductivity bottleneck threshold.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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