Synthesis and luminescence of β-SrGe(PO₄)₂:RE (RE=Eu²⁺,Eu³⁺,Tb³⁺) phosphors for UV light-emitting diodes

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• 作者：Yu JIANG (姜 雨) ; Wei LIU (柳 伟) ; ^{weiliu@ouc.edu.cn} ; Xiyu CAO (曹希禹) ; Ge SU (苏 革) ; Lixin CAO (曹立新) ; Rongjie GAO (高荣杰)
• 关键词：β-SrGe(PO4)2 ; luminescence ; phosphors ; LEDs ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：35
• 期：2
• 页码：142-148
• 全文大小：3872 K
• 卷排序：35

文摘

A new series of β-SrGe(PO4)2:RE (RE=Eu2+,Eu3+,Tb3+) phosphors were synthesized and characterized by using X-ray powder diffraction as well as excitation, and emission spectroscopy. The results exhibited that the singly doping Eu2+, Tb3+ and Eu3+ of β-SrGe(PO4)2 emit strong blue, green and red light under UV irradiation, respectively. Based on the charge transfer transitions of O2−→RE3+, an overlapping excitation band of the as-obtained phosphors could be found in UV region, which made β-SrGe(PO4)2:RE (RE=Eu2+,Eu3+,Tb3+) serve as a new series of RGB phosphors. Meanwhile, these phosphors could also be excited by 380 nm excitation simultaneously, and hence the three phosphors mixed physically could achieve the tunable hues from blue to white region by adjusting the mixed ratios.