Microstructure and luminescent properties of Eu^3+-activated MgGa2O4:Mn^2+ ceramic phosphors

作     者：A.Luchechko Y.Shpotyuk O.Kravets O.Zaremba K.Szmuc J.Cebulski A.Ingram R.Golovchak O.Shpotyuk A.LUCHECHKO;Y.SHPOTYUK;O.KRAVETS;O.ZAREMBA;K.SZMUC;J.CEBULSKI;A.INGRAM;R.GOLOVCHAK;O.SHPOTYUK

作者机构：Department of Sensor and Semiconductor ElectronicsIvan Franko National University of LvivLviv79017Ukraine Institute of PhysicsUniversity of RzeszowRzeszow35959Poland Department of Inorganic ChemistryIvan Franko National University of LvivLviv79005Ukraine Opole University of TechnologyOpole45370Poland Department of PhysicsEngineering and AstronomyAustin Peay State UniversityClarksvilleTN37044USA Faculty of Science and TechnologyJan Dlugosz UniversityCzestochowa42200Poland Vlokh Institute of Physical OpticsLviv79005Ukraine 

出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)

年 卷 期：2020年第9卷第4期

页      面：432-443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] 

基　　金：This study is supported by the Ministry of Education and Science of Ukraine under the Young Scientists Program(0117U007189) R.GOLOVCHAK acknowledges the U.S.National Science Foundation(Grant No.DMR-1725188)for the acquisition of PAL spectrometer J.CEBULSKI acknowledges support from the SAIA for partial support of this research within the National Scholarship Program of the Slovak Republic 

主　　题：spinel structure magnesium gallate MgGa2O4 X-ray diffraction(XRD) positron annihilation Mn2+and Eu3+luminescence 

摘      要：Mn2+and the trivalent europium(Eu3+)-doped MgGa2O4 ceramics are characterized using a multi-experimental *** formation of spinel-structured ceramics is ascertained from X-ray diffraction(XRD)*** investigations with transmission electron microscopy(TEM)show irregularly shaped grains and grain boundaries with a homogeneous distribution of Eu3+*** inability of Eu activator to penetrate the bulk of ceramic grains is inferred from positron annihilation lifetime spectroscopy *** Eu doping is shown to enhance the positron trapping rate due to the occupancy of vacancy-type defects at ceramic grains by Eu3+*** Mn2+and Eu3+doped samples show a broad multi-color luminescence in 350–650 nm range under 240 nm and 270–300 nm *** emission is concluded to originate from host defects,whereas green emission and narrow lines in the red region of the spectrum are attributed to Mn2+and Eu3+ions,*** asymmetry around Eu3+ions can be concluded from the photoluminescence and positron annihilation lifetime spectra analysis.