DICP OpenIR
Synthesis and luminescence properties of highly uniform spherical SiO2@SrSi2O2N2:Eu2+ core-shell structured phosphors
Tang, Jia-Ye1; Yang, Xiu-Fang1; Zhan, Cheng1; Hao, Lu-Yuan1; Xu, Xin1; Zhang, Wen-Hua2
Source PublicationJOURNAL OF MATERIALS CHEMISTRY
2012-01-14
DOI10.1039/c1jm12958a
Volume22Issue:2Pages:488-494
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Materials Science
WOS KeywordSOL-GEL PROCESS ; HEXAGONAL BORON-NITRIDE ; LIGHT-EMITTING-DIODES ; PHOTOLUMINESCENCE PROPERTIES ; OPTICAL-PROPERTIES ; ENERGY-TRANSFER ; SILICA SPHERES ; RED PHOSPHOR ; WHITE LEDS ; PARTICLES
AbstractThe novel SiO2@SrSi2O2N2:Eu2+ core-shell structured oxynitride phosphors were synthesized by an interfacial reaction mechanism for the first time. First, SrCO3:Eu3+ layers were deposited on monodispersed and spherical SiO2 templates through the urea homogeneous precipitation methods to fabricate the SiO2@SrCO3:Eu3+ precursor particles; then the precursor particles were coated with H3BO3, which will be transformed to a protective h-BN film to prevent the agglomeration of the SiO2 templates at high temperature; at last, the SiO2@SrSi2O2N2:Eu2+ core-shell structured phosphors were synthesized through a gas reduction and nitridation method at 1350 degrees C under a NH3 gas flow. A uniform dense shell composed of nano-sized (similar to 20 nm) SrSi2O2N2:Eu2+ grains tightly adhered to the surface of the SiO2 cores. X-Ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FE-SEM), high resolution transition electron microscopy (HR-TEM) as well as photoluminescence (PL) spectra were used to characterize the samples. The results indicate that the obtained submicron SiO2@SrSi2O2N2:Eu2+ phosphors consist of the outer h-BN film, the middle SrSi2O2N2:Eu2+ shell, and amorphous SiO2 cores and exhibit narrow particle size distribution, perfectly spherical morphology and non-aggregation. Under the excitation of UV and blue light, the phosphors show strong green emission due to the 4r(6)d-4f(7) transition of Eu2+. This study opens new possibilities to facilely synthesize highly stable spherical (oxo)nitridosilicate phosphors with monodispersity and improved luminescence properties for display and lighting devices.
Language英语
WOS IDWOS:000299020000031
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/143006
Collection中国科学院大连化学物理研究所
Affiliation1.Univ Sci & Technol China, Chinese Acad Sci Key Lab Mat Energy Convers, Dept Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian, Peoples R China
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GB/T 7714
Tang, Jia-Ye,Yang, Xiu-Fang,Zhan, Cheng,et al. Synthesis and luminescence properties of highly uniform spherical SiO2@SrSi2O2N2:Eu2+ core-shell structured phosphors[J]. JOURNAL OF MATERIALS CHEMISTRY,2012,22(2):488-494.
APA Tang, Jia-Ye,Yang, Xiu-Fang,Zhan, Cheng,Hao, Lu-Yuan,Xu, Xin,&Zhang, Wen-Hua.(2012).Synthesis and luminescence properties of highly uniform spherical SiO2@SrSi2O2N2:Eu2+ core-shell structured phosphors.JOURNAL OF MATERIALS CHEMISTRY,22(2),488-494.
MLA Tang, Jia-Ye,et al."Synthesis and luminescence properties of highly uniform spherical SiO2@SrSi2O2N2:Eu2+ core-shell structured phosphors".JOURNAL OF MATERIALS CHEMISTRY 22.2(2012):488-494.
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