N+(N=Li, Na, K)对发光材料M3(M=Ca, Sr, Ba)Y2(BO3)4∶Eu3+光谱的影响

doi:10.3964/j.issn.1000-0593(2008)11-2503-04

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Abstract The M₃(M=Ca, Sr, Ba)Y₂(BO₃)₄∶Eu³⁺ red phosphor was synthesized by firing twice at 800 and 1 050 ℃ each for 4 h and 4 h in air, respectively. Y₂O₃(99.9%), Eu₂O₃(99.9%), H₃BO₃(99.9%), CaCO₃(99.9%), SrCO3(99.9%), BaCO₃(99.9%), Li₂CO₃(99.9%), Na₂CO₃(99.9%) and K₂CO₃(99.9%) were used as starting materials, and the doping Eu³⁺ concentration was 3 mol%. The excitation spectrum was measured by a SHIMADZU RF-540 ultraviolet spectrophotometer. The emission spectrum was measured by a SPEX1404 spectrophotometer. All the luminescence characteristics of the phosphors were investigated at room temperature. The emission spectrum of M₃(M=Ca, Sr, Ba)Y2(BO₃)₄∶Eu³⁺ phosphor exhibited a 613 nm red emission corresponding to the electric dipole ⁵D₀-⁷F₂ transition of Eu³⁺ under 365 nm excitation. The excitation spectrum for 613 nm indicates that the phosphor can be effectively excited by ultraviolet (UV) (254, 365 and 400 nm) and blue (470 nm) light. The effect of Li⁺,Na⁺ and K⁺ on the excitation and emission spectra of M₃(M=Ca, Sr, Ba)Y₂(BO₃)₄∶Eu³⁺ phosphor was studied. The results show that the location of the excitation and emission spectrum of M₃(M=Ca, Sr, Ba)Y₂(BO₃)₄∶Eu³⁺ phosphor was not influenced by Li⁺,Na⁺ and K⁺. However, the excitation and emission spectrum intensities were greatly influenced by Li⁺,Na⁺ and K⁺,and the emission peak intensities were all enhanced. Under the condition of the same Li⁺,Na⁺ and K⁺ concentration, the emission peak intensities of M₃(M=Ca, Sr, Ba)Y₂(BO₃)₄∶Eu³⁺ phosphor were compared, and the result shows that the accretion effect of doping Li⁺ is the best. The effect of Li⁺ concentration on the emission peak intensity of Sr₃Y₂(BO₃)₄∶Eu³⁺ phosphor was studied. The results show that the emission peak intensity firstly increased with the increasing Li⁺ concentration, then decreased, and reached the maximum value at 5 mol% Li⁺,and the maximum value is about twice as much as the Li-undoped one.

Key words：M₃(M=Ca;Sr;Ba)Y₂(BO₃)₄∶Eu³⁺;Emission spectrum;Excitation Spectrum;Li⁺;Na⁺;K⁺

Received: 2007-09-03 Accepted: 2007-12-08

ZTFLH:

O433

Corresponding Authors: WANG Zhi-jun E-mail: wangzhijunmail@yahoo.com.cn

Cite this article:

LI Pan-lai,WANG Zhi-jun,GAO Hui-ying, et al. Effect of N⁺(N=Li, Na, K) on the Spectra of M₃(M=Ca, Sr, Ba)Y₂(BO₃)₄∶Eu³⁺ Luminescent Phosphor[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(11): 2503-2506.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2008)11-2503-04 OR https://www.gpxygpfx.com/EN/Y2008/V28/I11/2503

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