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Site Occupation of Eu2+ in Ba2-xSrxSiO4 (x=0-1.9) and Origin of Improved Luminescence Thermal Stability in the Intermediate Composition
Lin, LT; Ning, LX; Zhou, RF; Jiang, CY; Peng, MY; Huang, YC; Chen, J; Huang, Y; Tao, Y; Liang, HB; Huang Y(黄艳); Tao Y(陶冶)
2018
Source PublicationINORGANIC CHEMISTRY
ISSN0020-1669
EISSN1520-510X
Volume57Issue:12Pages:7090-7096
SubtypeArticle
AbstractKnowledge of site occupation of activators in phosphors is of essential importance for understanding and tailoring their luminescence properties by modifying the host composition. Relative site preference of Eu2+ for the two distinct types of alkaline earth (AE) sites in Ba1.9995-xSrxEu0.0005SiO4 (x = 0-1.9) is investigated based on photoluminescence measurements at low temperature. We found that Eu2+ prefers to be at the 9-coordinated AE2 site at x = 0, 0.5, and 1.0, while at x = 1.5 and 1.9, it also occupies the 10-coordinated AE1 site with comparable preference, which is verified by density functional theory (DFT) calculations. Moreover, by combining low-temperature measurements of the heat capacity, the host band gap, and the Eu2+ 4f(7), ground level position, the improved thermal stability of Eu2+ luminescence in the intermediate composition (x = 1.0) is interpreted as due to an enlarged energy gap between the emitting 5d level and the bottom of the host conduction band (CB), which results in a decreased nonradiative probability of thermal ionization of the 5d electron into the host CB. Radioluminescence properties of the samples under X-ray excitation are finally evaluated, suggesting a great potential scintillator application of the compound in the intermediate composition.
DOI10.1021/acs.inorgchem.8b00773
WOS KeywordAUGMENTED-WAVE METHOD ; CHARGE-TRANSFER ; ENHANCED PHOTOLUMINESCENCE ; STRUCTURAL RIGIDITY ; ENERGY-TRANSFER ; AB-INITIO ; PHOSPHORS ; OXIDE ; CE3+
Indexed BySCI
Language英语
WOS Research AreaChemistry
WOS SubjectChemistry, Inorganic & Nuclear
WOS IDWOS:000436023800038
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/286077
Collection多学科研究中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Lin, LT,Ning, LX,Zhou, RF,et al. Site Occupation of Eu2+ in Ba2-xSrxSiO4 (x=0-1.9) and Origin of Improved Luminescence Thermal Stability in the Intermediate Composition[J]. INORGANIC CHEMISTRY,2018,57(12):7090-7096.
APA Lin, LT.,Ning, LX.,Zhou, RF.,Jiang, CY.,Peng, MY.,...&陶冶.(2018).Site Occupation of Eu2+ in Ba2-xSrxSiO4 (x=0-1.9) and Origin of Improved Luminescence Thermal Stability in the Intermediate Composition.INORGANIC CHEMISTRY,57(12),7090-7096.
MLA Lin, LT,et al."Site Occupation of Eu2+ in Ba2-xSrxSiO4 (x=0-1.9) and Origin of Improved Luminescence Thermal Stability in the Intermediate Composition".INORGANIC CHEMISTRY 57.12(2018):7090-7096.
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