CAJ | 학술논문

采用高温固相法合成一种单一纯相绿色荧光粉Ca8MgLu(PO4)7：Tb3+,通过X射线衍射(XRD)、荧光光谱(PLE,PL)和荧光寿命曲线研究了Ca8MgLu(PO4)7：Tb3+的发光性能。 Ca8MgLu(PO4)7：Tb3+能被378 nm的近紫外光激发,Tb3+发生5D4-7F5跃迁发出绿光,色坐标为(0.324,0.592)。Ca8MgLu(PO4)7：Tb3+的量子效率可达84%,热猝灭性能良好：在150℃和200℃的发光强度积分分别是25℃的90.71%和86.36%。研究结果表明Ca8 MgLu( PO4)7：Tb3+是一种理想的适于 NUV-LED芯片激发的白光LED 用绿色荧光粉。
채용고온고상법합성일충단일순상록색형광분Ca8MgLu(PO4)7：Tb3+,통과X사선연사(XRD)、형광광보(PLE,PL)화형광수명곡선연구료Ca8MgLu(PO4)7：Tb3+적발광성능。 Ca8MgLu(PO4)7：Tb3+능피378 nm적근자외광격발,Tb3+발생5D4-7F5약천발출록광,색좌표위(0.324,0.592)。Ca8MgLu(PO4)7：Tb3+적양자효솔가체84%,열졸멸성능량호：재150℃화200℃적발광강도적분분별시25℃적90.71%화86.36%。연구결과표명Ca8 MgLu( PO4)7：Tb3+시일충이상적괄우 NUV-LED심편격발적백광LED 용록색형광분。
A green-emitting phosphor, Ca8 MgLu( PO4 ) 7:Tb3+, was synthesized by a solid-state re-action. The photoluminescence excitation ( PLE) , emission ( PL) spectra, and decay curves were measured to investigate photo-luminescent property of Tb3+ in Ca8 MgLu( PO4 ) 7 host. The excitation and emission spectra indicate that the phosphors can be effectively excited by the near ultraviolet ( NUV) light (378 nm) and emit strong green emission of Tb3+ 5 D4-7 F5 transition. The CIE chroma-ticity (x, y) of Ca8MgLu(PO4)7:Tb3+ is (0. 324, 0. 592). The internal quantum efficiency of Ca8 MgLu( PO4 ) 7:Tb3+ is as high as 84% under the excitation of 378 nm. The phosphors show a good thermal stability at high temperature (200 ℃) , and the emission intensity at 150 ℃ and 200℃ is 90. 71% and 86. 36% of that at 25 ℃. The results indicate that Ca8MgLu1-x(PO4)7:xTb3+can be served as a potential green-emitting phosphor candidate for NUV LED application.