红色荧光粉Zr(MoO_4)_2·MoO_3:Eu^(3+)的发光性能和能量转移

Optical property and energy transfer in the red phosphor Zr(MoO_4)_2·MoO_3:Eu^(3+)

采用共沉淀法制备了一系列Zr(MoO_4)_2·MoO_3∶Eu^(3+),并对荧光粉进行了X射线衍射仪和荧光光谱仪分析。结果表明:荧光粉为一混晶,由Zr(MoO4)2和MoO3组成。荧光粉在465nm的激发下,在617nm处产生强的红光发射,发射光谱在617nm处的强度是激发光谱在465nm处强度的2.26倍。这是因为在465nm的激发下,Eu3+的能量从磁偶极中心转移到电偶极中心,使617nm处发光增强。对蓝光激发白光LED而言,Zr(MoO4)2·MoO3∶Eu3+是具有一定应用前景的红色荧光粉。

A series of Zr(MoO4)2·MoO3∶Eu^3+phosphors were prepared by coprecipitation method,and analyzed by XRD and PL.The results showed that the phosphors had mixture crystalline phases of Zr(MoO4)2 and MoO3.The phosphors excited by 465 nm,and exhibited strong red emission peak at 617 nm.Emission spectrum(PL)intensity at 617 nm was 2.26 times as high as excitation spectrum(PLE)intensity at 465 nm.It was because that cooperative energy transfers from MD center to ED-Eu^3+excited by 465 nm,enhanced photoluminescence at 617 nm.Zr(MoO4)2·MoO3∶Eu^3+was a red-emitting phosphor which had application prospect for blue-based white LED.