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Optical and electrical conductivity properties of rare earth elements(Sm, Y, La, Er) co-doped CeO_(2)

Journal of Rare Earths 2022年第10期40卷 1619-1627页

作者： Rabia Kιrkgecit Handan ozlüTorun Fatma Kιlc Dokan Esra Oztürk Institute of Science Material Science and EngineeringKahramanmaras Süt?üImam UniversityKahramanmaras46050Turkey Department of Energy System Engineering Kahramanmaras Istiklal UniversityKahramanmaras46300Turkey Department of Chemistry and Chemical Processing Technologies Kayseri UniversityKayseriTurkey Department of metallurgical and materials Engineering Karamanoglu Mehmetbey UniversityKaramanTurkey

In this research,un-doped CeO_(2) and Ce_(0.85)La_(0.10)mO_(0.05)O_(2)(m:Sm,Er,Y) compounds were synthesized by hydrothermal method and the multi-functional properties are *** defects were created with the additives of rare earth *** electrical and luminescence behaviors of the synthesized compounds were investigated in accord with the types of *** synthesized products were characterized by X-ray diffraction(XRD) analysis,Brunauer-Emmett-Teller(BET) measurement,UV-vis diffuse reflectance spectroscopy(DRS),scanning electron microscopy(SEm),photoluminescence(PL)spectroscopy and electrochemical impedance spectroscopic(EIS).All synthesized compounds are found to be nano-structured and have cubic *** total conductivity of all samples was ***,the total conductivity of un-doped CeO_(2),Ce_(0.85)La_(0.10)Y_(0.05)O_(2),Ce_(0.85)La_(0.10)Er_(0.05)O_(2) and Ce_(0.85)La_(0.10)Sm_(0.05)O_(2) is found to be 2.07×10^(-10),5.70×10^(-4),1.0×10^(-3) and 0.0747 S/cm,***,bandgap energy(E_(g)) of these samples calculated from UV visible absorption spectra is discussed,and the optical results show variation between 3.2 and 2.15 ***,the luminescence properties of the compounds were investigated and different emissions occur depending on the additive ***,photoluminescent emission spectra of Ce_(0.85)La_(0.10)Y_(0.05)O_(2),Ce_(0.85)La_(0.10)Er_(0.05)O_(2) and Ce_(0.85)La_(0.10)Sm_(0.05)O_(2) phosphors indicate that these phosphors have red,green and orange-red colors,respectively.

关键词： Cerium oxide Co-doping Conductivity Luminescence Oxygen vacancy Rare earth elements

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