Preparation of Phosphors M2B4O7:Eu3+(M=Na, K) in Ambient Air and Their Property Characterization

Abstract

Abstract: M₂B₄O₇:Eu³⁺(M=Na, K) phosphors were synthesized by solid state reaction in ambient air. The optimum preparing conditions were studied and phase analyses were carried out by using powder XRD method. The structure of the borates contains both [BO₃] and [BO₄] coordination polyhedra. The luminescent properties of M₂B₄O₇:Eu³⁺ under ultraviolet light excitation were studied. The results show that the predominant emission of Eu³⁺ is ⁵D₀- ⁷F₂ transition, demonstrating that the rare earth ions occupy the non-centrosymmetrical sites in M₂B₄O₇ and Eu³⁺ ion can be stable in the matrix. The intensity of emission of Na₂B₄O₇:Eu³⁺ is stronger than that of K₂B₄O₇:Eu³⁺ when the doped Eu³⁺ concentration is the same.

Key words: Na₂B₄O₇:Eu³⁺, K₂B₄O₇:Eu³⁺, Crystal structure, Luminescent property

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LIU Xiao-Tang, SHI Chun-Shan, XIE De-Min, ZHUANG Guo-Xiong, LIANG Hui-Ying, YANG Dan . Preparation of Phosphors M₂B₄O₇:Eu³⁺(M=Na, K) in Ambient Air and Their Property Characterization[J]. Chem. J. Chinese Universities, 2004, 25(10): 1789.

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Preparation of Phosphors M₂B₄O₇:Eu³⁺(M=Na, K) in Ambient Air and Their Property Characterization

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