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Sm^(3+) ions doped Sm_(2)Si_(2)O_(7)-based glass ceramics:Crystallization,luminescence and energy transfer process through heat treatment

引用

Journal of Rare Earths 2023年第8期41卷 1144-1152,I0001页

作者： M.Monisha M.S.Murari Dalal Abdullah Aloraini aljawhara h.almuqrin M.I.Sayyed Karunakara Naregundi Sudha D.Kamath Department of Physics Manipal Institute of TechnologyManipal Academy of Higher EducationManipal576104India Scientific Officer DST-PURSE ProgramMangalore UniversityMangalagangotriKarnataka574199India Department of Physics College of SciencePrincess Nourah Bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Physics Faculty of ScienceIsra UniversityAmmanJordan Centre for Application of Radioisotopes and Radiation Technology(CARRT) Mangalore UniversityMangalagangotriKarnataka574199India Centre for Advanced Research in Environmental Radioactivity(CARER) Mangalore UniversityMangalagangotriKarnataka574199India

Sm^(3+) ions incorporated Sm_(2)Si_(2)O_(7) crystalline phase formed in the aluminoborosilicate glass matrix synthesized via melting quenching technique followed by heat-treatment process is reported *** preliminary confirmation on the obtained glass ceramics was made through X-ray diffration(XRD) *** of non-bridging oxygens(NBOs) in the glass network and the modes of vibrations of network units we re analyzed through Fourier transform infrared spectroscopy(FTIR) *** morphology of heat-treated samples at varying temperatures was determined via a field emission scanning electron microscope(FESEM).The absorption studies on heat-treated samples signify the low bandgap values and high Urbach energy values due to improved crystallinity in the glass ***-Ofelt intensity parameters identified for visible absorption transitions follow the trend of Ω_(4)>Ω_(2)>Ω_(6).Excitation and emission studies on heat-treated samples show improvement in their intensities compared to the unheated base *** thermal quenching is observed at higher temperatures(540 and 580℃ for 3 h) of heat-treated *** based on luminescence spectra including radiative transition probability,stimulated emission cross-section and branching ratio show good results for glass ceramics prior to precursor *** lifetimes of Sm^(3+) ions(milliseconds) in the level ^(4)G_(5/2) are seen for glass *** coordinates suggest the reddish-orange emissions from prepared glass ***,Sm^(3+) doped Sm_(2)Si_(2)O_(7) glass ceramics are favorable materials for solid-state lighting and laser applications.

关键词： Sm^(3+)ions Glass ceramics Luminescence spectra Stimulated emission cross-section Rare earths

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