Ba3Y(PO4)3:Dy3+,Eu3+单基质白光荧光粉的制备与发光性能

摘要

为了探究在Dy3+掺杂Ba3 Y(PO4)3荧光粉中共掺Eu3+离子对其发光性能的影响,我们采用传统高温固相法制备了一系列Dy3+、Eu3+单掺杂和共掺杂Ba3 Y(PO4)3荧光粉.通过X射线衍射(XRD)、荧光发射光谱和荧光衰减曲线对样品进行了表征.结果表明,所制备的荧光粉呈闪铋矿立方相.在近紫外光激发下,Ba3 Y(PO4)3:Dy3+发射光谱在487和578 nm处有两个窄带发射峰,呈冷白光发射;Ba3 Y(PO4)3:Eu3+发射光谱的窄带发射位于594和616 nm处,呈发橙红光.在Ba3 Y(PO4)3:Dy3+,Eu3+中,由于Eu3+离子补偿Dy3+冷白光发射所缺的红色组分,从而实现了色纯度高、色温适中的暖白光发射.进一步探索了Ba3 Y(PO4)3:Dy3+,Eu3+荧光粉发光机理.所制备的Ba3 Y(PO4)3:Dy3+,Eu3+单基质白光荧光粉在白光近紫外激发白光二极管(UV-WLED)领域具有潜在应用价值.%A series of Dy3+ and/or Eu3+ doped Ba3 Y(PO4 )3 phosphors was prepared via a traditional high temperature solid state reaction to investigate how the luminescent properties of Dy3+ doped Ba3 Y(PO4 )3 phosphor can be tuned by co-doping Eu3+ ions into the host lattice. X-ray diffraction (XRD ), photoluminescence and fluorescence lifetime were used to characterize the as-prepared samples. The results show that all the samples have Ba3 Y(PO4 )3 eulytite cubic structure. Under the excitation of near-UV light, the Ba3 Y(PO4 )3:Dy3+ phosphor shows cool-white emission and the Ba3 Y(PO4 )3:Eu3+ phosphor presents an orange-red emission. For Ba3 Y(PO4 )3:Dy3+,Eu3+ phosphor,warm-white emission with high color rendering index and appropriate correlated color temperature has been obtained by combining red emission of Eu3+with cool-white emission of Dy3+. The luminescence mechanism of Ba3 Y(PO4 )3:Dy3+,Eu3+ phosphor has been tentatively proposed and the prepared Ba3 Y(PO4 )3:Dy3+,Eu3+ phosphor has potential application in white-light-emitting-diodes(WLEDs)filed.