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 Rabia K(i)rkge?it;Handan ?zlü Torun;Fatma K(i)l(i)? Dokan;Esra ?ztürk

作者机构：Institute of ScienceMaterial Science and EngineeringKahramanmaras Süt?üImam UniversityKahramanmaras46050Turkey Department of Energy System EngineeringKahramanmaras Istiklal UniversityKahramanmaras46300Turkey Department of Chemistry and Chemical Processing TechnologiesKayseri UniversityKayseriTurkey Department of Metallurgical and Materials EngineeringKaramanoglu Mehmetbey UniversityKaramanTurkey 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2022年第40卷第10期

页      面：1619-1627页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0804[工学-仪器科学与技术] 0703[理学-化学] 

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

主　　题：Cerium oxide Co-doping Conductivity Luminescence Oxygen vacancy Rare earth elements 

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.