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

作　　者：Rabia Kιrkgecit Handan OzlüTorun Fatma Kιlc Dokan Esra Oztürk 

机构地区：[1]Institute of Science,Material Science and Engineering,Kahramanmaras Süt?üImam University,Kahramanmaras,46050,Turkey [2]Department of Energy System Engineering,Kahramanmaras Istiklal University,Kahramanmaras,46300,Turkey [3]Department of Chemistry and Chemical Processing Technologies,Kayseri University,Kayseri,Turkey [4]Department of Metallurgical and Materials Engineering,Karamanoglu Mehmetbey University,Karaman,Turkey

出　　处：《Journal of Rare Earths》2022年第10期1619-1627,共9页稀土学报（英文版）

基　　金：the financial support provided by Kahramanmaras Istiklal University;Kahramanmaras Süt?ü Imam University (2019/5-7 YLS)。

摘　　要：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 reported.Oxygen defects were created with the additives of rare earth ions.The electrical and luminescence behaviors of the synthesized compounds were investigated in accord with the types of additives.The 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 phase.The total conductivity of all samples was calculated.Hence,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,respectively.Also,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 eV.Additionally,the luminescence properties of the compounds were investigated and different emissions occur depending on the additive type.Accordingly,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 

分 类 号：TQ133.3[化学工程—无机化工]