A novel narrow band UV-B emitting phosphor-YPO₄:Sb³⁺,Gd³⁺

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• 作者：Taoli DENG ((邓陶丽))^a ; Shirun YAN ((闫世润))^a ; ^{sryan@fudan.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Jianguo HU ((胡建国))^a
• 关键词：narrow band UV-B emission ; YPO4 ; Sb3+ ; Gd3+ ; Sb3+ sensitization ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：34
• 期：2
• 页码：137-142
• 全文大小：1116 K

文摘

YPO₄ phosphors single-doped with Sb³⁺ or Gd³⁺ and co-doped with Sb³⁺ and Gd³⁺ were prepared by a solid-state reaction method. The phase purity, morphology, photoluminescence excitation and emission properties of the prepared phosphors were investigated. The results showed that Sb³⁺ could sensitize Gd³⁺ in the co-doped phosphors which made the phosphors excitable by short-wave ultraviolet (UV) at a wavelength between 220 and 260 nm. Under 253.7 nm excitation, the co-doped phosphors Y_1-x-yPO₄: Sb³⁺_x,Gd³⁺_y showed strong emission of Gd³⁺ at a wavelength of 312 nm whose intensity changed with the doping concentrations of Gd³⁺ and Sb³⁺. The optimized Y_0.77PO₄:Sb³⁺_0.07,Gd³⁺_0.16 phosphor showed an intensity comparable to commercial LaPO₄:Ce phosphor (UVB-315), making it a potential candidate for mercury low-pressure discharge narrow-band UV-B emitting lamps.