Crystal structure and photoluminescence properties of Eu²⁺-activated Ba₂LiB₅O₁₀ phosphors

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• 作者：Qian Wang^a ;   ; ^{wq0205228.good@163.com} ; Degang Deng^a ; Shiqing Xu ;   ; ^a ;   ; ^{sxucjlu@hotmail.com} ; Youjie Hua^a ; Lihui Huang^a ; Huanping Wang^a ; Shilong Zhao^a ; Guohua Jia^a ; Chenxia Li^a
• 关键词：Phosphors ; Luminescence properties ; Crystal structure ; Bond covalency
• 刊名：Optics Communications
• 出版年：2011
• 出版时间：15 October 2011
• 年：2011
• 卷：284
• 期：22
• 页码：5315-5318
• 全文大小：574 K

文摘

A novel orange-yellow-emitting Ba₂LiB₅O₁₀:Eu²⁺ phosphor has been synthesized by traditional high temperature solid state reaction. A monoclinic crystal structure of Barium lithiumborates Ba₂LiB₅O₁₀ was verified by the investigation of X-ray diffraction (XRD). The compound crystallizes in the space group of P121/m1(11) (Z = 2) with the unit cell parameters a = 4.414(1) ?, b = 14.576(2) ?, c = 6.697(2) ? and ¦Â = 104.26(2)¡ã. Barium and lithium atoms are located in distorted octahedral and tetrahedral oxygen coordinations, respectively. Upon around 365 nm excitation, the Eu²⁺-activated Ba₂LiB₅O₁₀ phosphors exhibit a single broad emission band with the maximum at about 587 nm, due to the 4f⁶5d ?4f⁷(8S_7/2) transition of Eu²⁺. This work investigates the relationship between luminescence properties and structural characterization of the Ba₂LiB₅O₁₀: Eu²⁺. This newly developed phosphor shows high potential as a phosphor conversion for white LED applications.