Characteristics of Fe- and Mg-doped CuCrO2 nanocrystals prepared by hydrothermal synthesis

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dc.contributor.authorKaya, İsmail Cihan
dc.contributor.authorSevindik, Mehmet Alper
dc.contributor.authorAkyıldız, Hasan
dc.date.accessioned2020-03-26T19:23:17Z
dc.date.available2020-03-26T19:23:17Z
dc.date.issued2016
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractA series of Cu(Cr1-xFex)O-2 and Cu(Cr1-yMgy)O-2 (0.0 <= x,y <= 0.05) nanocrystalline samples with high surface area were prepared using hydrothermal synthesis. The effect of Fe3+ substitution for Cr3+ on the structural, morphological, optical and electrical characteristics of CuCrO2 nanoparticles was investigated in comparison with Mg-doped samples. X-ray diffraction study showed that the solubility limit was around 3 at% for both dopants and beyond this concentration the formation of spinel phases was observed. The incorporation of the tri- and divalent dopants induced a slight expansion in a- and c-parameters. Transmission electron microscopy examination indicated that the average crystallite size (12 nm for undoped) decreased with increasing doping amount of up to x = 0.03 (8.5 nm) and y = 0.05 (7 nm). Moreover, the introduction of Fe and Mg led to an increase in the size distribution of the crystallites. All samples exhibited transmittance above 80 % at 700 nm wavelength and transmittance was enhanced for all doping concentrations except for x = 0.05. A similar trend was also observed for the direct band gaps, where only 5 at% Fe doping induced a red-shift of Eg. The direct band gaps were estimated to be 3.09 eV for x = 0.03 and 3.07 eV for y = 0.03. At room temperature, the minimum achieved electrical resistivity was measured to be 6.4 and 0.068 k Omega cm for the samples with x, y = 0.03, respectively. These values are lower by a factor of similar to 2 and 166 than that of the undoped CuCrO2 sample (11.8 k Omega cm). All samples behaved like semiconductors, and the thermally activated energy for Cu(Cr0.97Mg0.03)O-2 and Cu(Cr0.97Fe0.03)O-2 pellets were found to be 45.40 and 92.5 meV, respectively.en_US
dc.description.sponsorshipScientific Research Foundation (BAP) of Selcuk UniversitySelcuk University [14401104]; TUBITAK MAGTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [214M410]; Academic Staff Training Program (OYP)Ministry of National Education - Turkey [2013-OYP-087]en_US
dc.description.sponsorshipSupport for this work is provided by the Scientific Research Foundation (BAP) of Selcuk University (Project Number 14401104), TUBITAK MAG (Project Number 214M410) and Academic Staff Training Program (OYP) (Project Number 2013-OYP-087) which authors gratefully acknowledge.en_US
dc.identifier.doi10.1007/s10854-015-4038-4en_US
dc.identifier.endpage2411en_US
dc.identifier.issn0957-4522en_US
dc.identifier.issn1573-482Xen_US
dc.identifier.issue3en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage2404en_US
dc.identifier.urihttps://dx.doi.org/10.1007/s10854-015-4038-4
dc.identifier.urihttps://hdl.handle.net/20.500.12395/33341
dc.identifier.volume27en_US
dc.identifier.wosWOS:000372170800032en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSPRINGERen_US
dc.relation.ispartofJOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICSen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.titleCharacteristics of Fe- and Mg-doped CuCrO2 nanocrystals prepared by hydrothermal synthesisen_US
dc.typeArticleen_US

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