CAJ | 학술논문

采用水热法制备了 LiY(MoO 4)2∶ RE3＋(RE＝ Eu、Sm、Pr)系列荧光粉,通过 X 射线衍射(XRD),扫描电镜(SEM)对该系列荧光粉的物相、形貌进行了表征.结果表明,稀土离子的掺入没有改变荧光粉的晶相,3种稀土离子的加入使得 LiY (MoO 4)2粉体形成片层状结构.利用 PL(光致发光光谱)对样品的发光性能进行了测试,分析了稀土离子掺杂浓度对发光强度的影响并进行浓度猝灭机理分析,结果表明,Eu3＋、Sm3＋、Pr3＋最佳掺杂浓度分别为7％,4％和1．5％.LiY(MoO 4)2∶Eu3＋荧光粉能够很好地被395 nm 的紫外光和465 nm 的蓝光有效激发而发射红光,而 Sm3＋和 Pr3＋掺杂的 LiY(MoO 4)2分别在406和453 nm 激发下,发射出650和657 nm 的红光,LiY(MoO 4)2∶RE3＋(RE＝Eu、Sm、Pr)系列荧光粉有望成为白光 LED 用红色荧光粉.
채용수열법제비료 LiY(MoO 4)2∶ RE3＋(RE＝ Eu、Sm、Pr)계렬형광분,통과 X 사선연사(XRD),소묘전경(SEM)대해계렬형광분적물상、형모진행료표정.결과표명,희토리자적참입몰유개변형광분적정상,3충희토리자적가입사득 LiY (MoO 4)2분체형성편층상결구.이용 PL(광치발광광보)대양품적발광성능진행료측시,분석료희토리자참잡농도대발광강도적영향병진행농도졸멸궤리분석,결과표명,Eu3＋、Sm3＋、Pr3＋최가참잡농도분별위7％,4％화1．5％.LiY(MoO 4)2∶Eu3＋형광분능구흔호지피395 nm 적자외광화465 nm 적람광유효격발이발사홍광,이 Sm3＋화 Pr3＋참잡적 LiY(MoO 4)2분별재406화453 nm 격발하,발사출650화657 nm 적홍광,LiY(MoO 4)2∶RE3＋(RE＝Eu、Sm、Pr)계렬형광분유망성위백광 LED 용홍색형광분.
LiY(MoO 4 )2 ∶RE3 + (RE=Eu,Sm,Pr)red phosphors have been successfully synthesized via a mild and facile hydrothermal route.The resulting products were characterized by X-ray powder diffraction (XRD), scanning electron microscopy(SEM),and photoluminescence(PL)spectroscopy.The results showed that the phosphors prepared by hydrothermal method are with LiY(MoO 4 )2 crystalline phase,the phosphors with layer meso-structure and uniform particle size distribution.Eu3 + ,Sm3 + and Pr3 + concentration of 7%,4% and 1.5%. LiY(MoO 4 )2 ∶Eu3 + powders can be excited efficiently by ultraviolet light with the wavelength of 395 nm and visible blue light with the wavelength of 465 nm.The Sm3 + and Pr3 + doped LiY(MoO 4 )2 phosphors can be ex-cited efficiently by 406 and 453 nm,and show a strong red emission of 650 and 657 nm.The LiY(MoO 4 )2 ∶RE3 + (RE=Eu,Sm,Pr)phosphors are proming as red-emitting phosphors for white light emitting diodes.