Enhanced orange-red emission by using Mo codoped in Ba₂CaWO₆: Eu³⁺, Li⁺ phosphor under near UV excitation

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• 作者：Xiaoyuan Sun^a ; ^{xueyuan309@yahoo.com.cn} ; Zhendong Hao^b ; Chunjie Li^a ; Xiaoguang He^a ; Haiyan Qi^a ; Lijun Yu^a ; Yongshi Luo^b ; Jiahua Zhang^b ; Jiwei Gao^a ; Ruixia Zhong^c
• 关键词：Photoluminescence ; Phosphor ; White light emitting diode
• 刊名：Journal of Luminescence
• 出版年：2013
• 出版时间：February, 2013
• 年：2013
• 卷：134
• 期：Complete
• 页码：191-194
• 全文大小：406 K

文摘

The orange-red emitting phosphors Ba₂Ca_0.9Mo_xW_1?xO₆:Eu³⁺_0.05, Li⁺_0.05 (x=0, 0.05, 0.1, 0.15, 0.2, 0.25, 0.5, 0.75, and 1.0) and Ba₂Ca_1?2yMo_0.2W_0.8O₆:Eu³⁺_y, Li⁺_y (y=0.03, 0.05, 0.07, 0.1, and 0.15) were synthesized. The crystalline structure and photoluminescence properties of these phosphors were described. The strong orange-red emission of Eu³⁺ (⁵D₀¡ª⁷F₁ transition) at around 593 nm was observed. Addition of Mo strongly enhances the charge transfer band absorption in the near ultraviolet region that corresponds to near ultraviolet white light emitting diode. The dependence of photoluminescence intensities on Eu³⁺ concentrations with optimal Mo concentration under 400 nm excitation was studied. The phosphor is considered to be a promising orange-red emitting phosphor for near ultraviolet GaN-based white light emitting diode.