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

作　　者：M.Monisha M.S.Murari Dalal Abdullah Aloraini Aljawhara H.Almuqrin M.I.Sayyed Karunakara Naregundi Sudha D.Kamath 

机构地区：[1]Department of Physics,Manipal Institute of Technology,Manipal Academy of Higher Education,Manipal,576104,India [2]Scientific Officer,DST-PURSE Program,Mangalore University,Mangalagangotri,Karnataka,574199,India [3]Department of Physics,College of Science,Princess Nourah Bint Abdulrahman University,P.O.Box 84428,Riyadh,11671,Saudi Arabia [4]Department of Physics,Faculty of Science,Isra University,Amman,Jordan [5]Centre for Application of Radioisotopes and Radiation Technology(CARRT),Mangalore University,Mangalagangotri,Karnataka,574199,India [6]Centre for Advanced Research in Environmental Radioactivity(CARER),Mangalore University,Mangalagangotri,Karnataka,574199,India

出　　处：《Journal of Rare Earths》2023年第8期1144-1152,I0001,共10页稀土学报（英文版）

基　　金：supported by Department of Science and Technology (DST)-Science and Engineering Research Board (SERB),Government of India(DST-SERB-EMR/2017/001548)。

摘　　要：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 herewith.The preliminary confirmation on the obtained glass ceramics was made through X-ray diffration(XRD) studies.Formation 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) studies.Surface 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 network.Judd-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 glass.The thermal quenching is observed at higher temperatures(540 and 580℃ for 3 h) of heat-treated samples.Calculations based on luminescence spectra including radiative transition probability,stimulated emission cross-section and branching ratio show good results for glass ceramics prior to precursor glass.Longer lifetimes of Sm^(3+) ions(milliseconds) in the level ^(4)G_(5/2) are seen for glass ceramics.Color coordinates suggest the reddish-orange emissions from prepared glass ceramics.Thus,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 

分 类 号：TQ171.733[化学工程—玻璃工业]