Luminescence Property of La2CaB10O19:Ce3+in VUV-Vis Range

Chem. J. Chinese Universities ›› 2003, Vol. 24 ›› Issue (9): 1541.

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Luminescence Property of La₂CaB₁₀O₁₉:Ce³⁺in VUV-Vis Range

HE Hong¹, LIANG Hong-Bin², TAO Ye³, WANG Shu-Bin¹, SU Qiang^1,2

1. Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2. State Key Laboratory of OptoelectronicMaterials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China;
3. Laboratory of Beijing Synchrotron Radiation, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China

Received:2002-11-12 Online:2003-09-24 Published:2003-09-24

Abstract

Abstract: The excitation and emission spectra of La₂CaB₁₀O₁₉: Ce³⁺in VUV-Vis range were investigated. Three bands peaking at 307, 330 and 356 nm in emission spectrum and six bands peaking at 194, 224, 243, 260, 274 and 318 nm in excitation spectra are observed. This fact indicates that Ce³⁺ions occupy two kinds of lattice sites in La₂CaB₁₀O₁₉, one kind is substituted for La³⁺with coordination number ten and the other is substituted for Ca²⁺with coordination number eight. This result is consistent with that of La₂CaB₁₀O₁₉: Eu³⁺. When Eu³⁺is used as a structural probe, two ⁵D₀→⁷F₀transitions peaking at 576. 8 and 578. 8 nm are observed in the emission spectrum. This indicates that Eu³⁺ions also occupy two kinds of lattice sites in La₂CaB₁₀O_19.The broad band peaking at 162 nm can be attributed to the host absorption, and the charge transition band(CTB) of O₂-→Ce³⁺may be obscured in this broad band.

Key words: VUV, Luminescence, Ce³⁺, Borate, Lattice site

CLC Number:

O614.33

TrendMD:

HE Hong, LIANG Hong-Bin, TAO Ye, WANG Shu-Bin, SU Qiang. Luminescence Property of La₂CaB₁₀O₁₉:Ce³⁺in VUV-Vis Range[J]. Chem. J. Chinese Universities, 2003, 24(9): 1541.

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Luminescence Property of La₂CaB₁₀O₁₉:Ce³⁺in VUV-Vis Range

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