钒磷酸钇铕PDP用荧光粉的合成及其发光特性研究

Synthesis and Luminous Characteristics of Y(P, V)O_4 :Eu^(3+) Phosphors for PDP

采用共沉淀法成功合成了Y(P,V)O4:Eu3+荧光粉,并利用SEM、变温紫外激光激发及真空紫外激 发下的发射光谱对所合成粉体的表面形貌及发光性能进行了表征。试验结果表明,与高温固相合成法相比, 共沉淀法合成的Y(P,V)O4:Eu3+荧光粉的颗粒形貌好,发光强度明显提高;在325 nm激光激发下,低温时 存在基质VO43-的蓝色宽带发射,随着温度升高,VO43-吸收的激发能量逐渐传递给Eu3+,使其发光逐渐增 强,当温度高于临界点时,Eu3+发射出现温度猝灭;Y(P,V)O4:Eu3+荧光粉发射主峰位于619 nm,色纯度 好,且发光亮度与彩色PDP用商品红粉(Y,Gd)BO3:Eu3+相当。

Y（P,V）O4 ：Eu^3＋ phosphors with good morphology for plasma display panels have been prepared v/a coprecipitation reaction. The phosphor was characterized by SEM and photolumineseence under UV（325 nm）and VUV（147 nm） excitation. The emis： sion spectra depending on temperature under 325 nm excitation by laser indicated that there exist energy transfer between VO4^3- group and Eu^3＋ ion. Under 147 nm excitation, the most intense emission peaks of commercial （Y, Gd）BO3 ： Eu^3＋ phosphor range around 593 nm, and those of Y（P,V）O4 ：Eu^3＋ phosphors prepared by coprecipitation reaction ranged around 619 nm. The red emission color purity of Y（P,V）O4 ：Eu^3＋ phosphor is much better than that of （Y,Gd）BO3 ：Eu^3＋ , and its relative emission intensity is almost close to that of the commercial phosphor.