CAJ | 학술논문

采用高温固相法合成了名义组成为Sr1.5Ca0.5 SiO4:0.01 Eu3+,nTb3+(n =3.0×10-4,7.0×10-4,1.5×10-3 mol)的荧光粉.X射线衍射测试表明荧光粉样品为单一物相.在紫外光(394 nm)激发下,样品同时产生蓝光、绿光和红橙光发射,分别对应于Eu2+离子的5d→4f,Tb3+离子的5 D4→7FJ和Eu3+离子的5D0→7FJ跃迁,表明部分Eu3+离子在还原气氛下被还原成Eu2+.红光、绿光和蓝光发射强度相当,复合得到白光.色坐标(CIE)计算结果显示,荧光粉Sr1.5Ca0.5SiO4:0.01 Eu3+,7.0×10-4 Tb3+的白色发光(CIE:x=0.321,y=0.322)接近纯白色(CIE:x=0.33,y=0.33),表明它是一种很有应用前景的基于紫外光芯片的单基白光荧光粉.
채용고온고상법합성료명의조성위Sr1.5Ca0.5 SiO4:0.01 Eu3+,nTb3+(n =3.0×10-4,7.0×10-4,1.5×10-3 mol)적형광분.X사선연사측시표명형광분양품위단일물상.재자외광(394 nm)격발하,양품동시산생람광、록광화홍등광발사,분별대응우Eu2+리자적5d→4f,Tb3+리자적5 D4→7FJ화Eu3+리자적5D0→7FJ약천,표명부분Eu3+리자재환원기분하피환원성Eu2+.홍광、록광화람광발사강도상당,복합득도백광.색좌표(CIE)계산결과현시,형광분Sr1.5Ca0.5SiO4:0.01 Eu3+,7.0×10-4 Tb3+적백색발광(CIE:x=0.321,y=0.322)접근순백색(CIE:x=0.33,y=0.33),표명타시일충흔유응용전경적기우자외광심편적단기백광형광분.
A series of the nominal composition Sr1.5Ca0.5SiO4:0.01 Eu3+,nTh3+ (n =3.0 × 10-4,7.0 × 10-4,1.5 × 10-3 mol) phosphors with single phase was synthesized by high temperature solid-state reaction.Upon the excitation by near-UV light(394 nm),the phosphors give blue,green and orange-red emissions which are originated from Eu2 + 5d→ 4f,Tb3 + 5 D4→7FJ and Eu3 + 5 D0→7FJ transitions,respectively,with comparable intensities,resulting in white light emission.The results of CIE calculation show that the Sr1.5Ca0.5SiO4:0.01 Eu3+,7.0 × 10-4 Tb3+ phosphor can provide white emission (x =0.321,y =0.322) very close to the standard white (x =0.33,y =0.33 ),indicating it is a potential single-phased white phosphor for LED-based UV-chip.