High-efficient, bicolor-emitting GdVO₄:Dy³⁺ phosphor under near ultraviolet excitation

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• 作者：Jinjin Lu^a ; Jia Zhou^a ; Huayu Jia^b ; Yue Tian^b ; ^{tianyue@tyut.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：GdVO4 ; Bicolor emitting phosphor ; Columniation-shape ; Equal energy point ; Energy transfer
• 刊名：Physica B: Physics of Condensed Matter
• 出版年：2015
• 出版时间：1 November 2015
• 年：2015
• 卷：476
• 期：Complete
• 页码：50-54
• 全文大小：816 K

文摘

Bicolor emitting GdVO₄:Dy³⁺ phosphor with short columniation-shape was prepared via a simple co-precipitation process. The optimal doping concentration for obtaining maximal luminescent intensity was confirmed to be 0.3 mol% and the electric dipole–dipole interaction is responsible for concentration quenching of Dy³⁺ emission in GdVO₄ phosphor. In order to evaluate the luminescent performance of as-prepared phosphor, the luminescent efficiency and color coordinates were studied. The results show that luminescent efficiency of this phosphor is very high under near UV excitation and twice times higher than commercial Y₂O₂S:Eu³⁺ phosphor. In addition, the color coordinates for optimal Dy³⁺ concentration are (0.339, 0.379), which are close to equal energy point. Therefore, the GdVO₄:Dy³⁺ phosphor may have potential application for solid state lighting.