Synthesis and luminescence of β-SrGe(PO4)2：RE(RE=Eu^2＋,Eu^3＋,Tb^3＋) phosphors for UV light-emitting diodes  

作　　者：姜雨 柳伟 曹希禹 苏革 曹立新 高荣杰 

机构地区：[1]Institute of Materials Science and Engineering, Ocean University of China, Qingdao 266100 China

出　　处：《Journal of Rare Earths》2017年第2期142-148,共7页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(21271161);the Program for New Century Excellent Talents in University(NCET-13-0530)

摘　　要：A new series of β-Sr Ge（PO_4）_2：RE（RE=Eu^2＋,Eu^3＋,Tb^3＋） 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＋, Tb^3＋ and Eu^3＋ of β-Sr Ge（PO_4）_2 emit strong blue, green and red light under UV irradiation, respectively. Based on the charge transfer transitions of O^2-→RE^3＋, an overlapping excitation band of the as-obtained phosphors could be found in UV region, which made β-Sr Ge（PO_4）_2：RE（RE=Eu^2＋,Eu^3＋,Tb^3＋） 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.A new series of β-Sr Ge（PO_4）_2：RE（RE=Eu^2＋,Eu^3＋,Tb^3＋） 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＋, Tb^3＋ and Eu^3＋ of β-Sr Ge（PO_4）_2 emit strong blue, green and red light under UV irradiation, respectively. Based on the charge transfer transitions of O^2-→RE^3＋, an overlapping excitation band of the as-obtained phosphors could be found in UV region, which made β-Sr Ge（PO_4）_2：RE（RE=Eu^2＋,Eu^3＋,Tb^3＋） 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.

关 键 词：β-SrGe（PO_4）_2 luminescence phosphors LEDs rare earths 

分 类 号：TQ422[化学工程]