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Relationship between Eu3+ substitution sites and photoluminescence properties of SrIn2O4:Eu3+ spinel phosphors
Kang, Yipu1; Thuy, Bui1; Shimokawa, Yohei1; Hayakawa, Tomokatsu1; Sakaida, Satoshi1; Miao, Lei2; Tanemura, Sakae2; Honda, Sawao1; Iwamoto, Yuji1
AbstractEu3+-doped SrIn2O4 phosphors were synthesized by the solid solution method at 1400 degrees C in air. The chemical composition of the phosphors was systematically changed to study the relation between the Eu3+ substitution site and photoluminescence (PL) properties. Under excitation of the F-7(0)-> L-5(6) transition of Eu3+ at 393 nm, the SrIn2O4:Eu3+ exhibited dominant red emission peaks at 611, 616 and 623 nm, which are attributed to the electric dipole transition D-5(0)-> F-7(2) of Eu3+. The results of X-ray diffraction analysis combined with PL spectroscopic analysis revealed that Eu3+ ions occupied two different crystallographic In3+ sites in the host SrIn2O4, while it was found to be impossible to substitute Sr2+ with Eu3+ prior to the Eu3+ substitution at the In3+ sites in the SrIn2O4. The intensity of the red emission peaks increased with the total amount of dopant Eu3+ ion at the two In3+ sites, and reached a maximum at 25 mol% Eu3+-doping (SrIn2-xO4:xEu(3+), x=0.25). Moreover, a small amount (< 10 mol%) of Eu3+ at the Sr2+ site in the SrIn2-xO4:xEu(3+) was found to contribute to enhance the red emission peak intensity at 616 nm. As a result, the highest red emission intensity evaluated as the total emission peak intensities at the 611, 616 and 623 nm was achieved for Sr0.92In1.75O4:0.33Eu(3+) in which Eu3+ ion concentrations at the In3+ and Sr2+ sites were simultaneously optimized as 25 and 8 mol%, respectively (Sr1-yIn2-xO4:(x+y)Eu3+, x=0.25, y=0.08). This red emission intensity was 2.2 times higher than that of the phosphor without contribution of the Eu3+ at the Sr2+ site (SrIn2-xO4:xEu(3+), x=0.25). The critical energy transfer distance of Eu3+ ion in the Sr0.92In1.75O4:0.33Eu(3+) phosphor was determined to be 0.817 nm, and the electric multipolar interaction was suggested as the dominant mechanism for concentration quenching of PL emission due to Eu3+ ions in the Eu3+-doped SrIn2O4 phosphors investigated in this study. (C) 2015 Elsevier B.V. All rights reserved.
KeywordSrin2o4 Eu3++ Substitution Site Photoluminescence Red Emitting Thermal Quenching Property
WOS HeadingsScience & Technology ; Physical Sciences
WOS Subject ExtendedOptics
Indexed BySCI
WOS SubjectOptics
WOS IDWOS:000365604700012
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Document Type期刊论文
Affiliation1.Nagoya Inst Technol, Grad Sch Engn, Dept Frontier Mat, Showa Ku, Nagoya, Aichi 4668555, Japan
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Kang, Yipu,Thuy, Bui,Shimokawa, Yohei,et al. Relationship between Eu3+ substitution sites and photoluminescence properties of SrIn2O4:Eu3+ spinel phosphors[J]. JOURNAL OF LUMINESCENCE,2016,169:78-85.
APA Kang, Yipu.,Thuy, Bui.,Shimokawa, Yohei.,Hayakawa, Tomokatsu.,Sakaida, Satoshi.,...&Iwamoto, Yuji.(2016).Relationship between Eu3+ substitution sites and photoluminescence properties of SrIn2O4:Eu3+ spinel phosphors.JOURNAL OF LUMINESCENCE,169,78-85.
MLA Kang, Yipu,et al."Relationship between Eu3+ substitution sites and photoluminescence properties of SrIn2O4:Eu3+ spinel phosphors".JOURNAL OF LUMINESCENCE 169(2016):78-85.
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