K+掺杂对Y2O3:Eu3+粉末发光强度与量子效率的影响

Effect of K+ Doping on Luminescent Intensity and Quantum Efficiency of Y2O3:Eu3+ Powder

采用水热法制备Y2O3：Eu^3＋ 荧光粉.首先,制备不同配比的Y2O3： Eu^3＋荧光粉,确定 Eu^3＋的最佳掺杂 比例,在此基础上引入不同掺杂量的K^＋,研究 K^＋对 Y2O3 Eu^3＋荧光粉性能的影响.用X射线衍射仪（ XRD）、场发 射扫描电镜（ FE-SEM）、荧光光谱仪（PL）等测试手段来表征荧光粉的物相结构、微观形貌及荧光性能.结果表明： K＋的最佳掺杂比是n （Y^3＋） ： n（Eu^3＋ ） ： n （K ＋ ） 为 25：1：1,其发光强度比未掺杂 K＋之前提高了19.1 %,量子效率比未掺杂K^＋ 之前提高了27. 1%.

In this paper, Y2O3 ： Eu3 phosphor was prepared by hydrothermal method. First of all, different ratio of Y2O3： Eu3 phosphor was synthesized and the optimal doping ratio of Eu3 wasconfirmed. And on the basis,different dosage of K was doped into Y2O3 ： Eu3 phosphor,and the effects of K on properties of Y2O3： Eu3 phosphor were studied. XRD,FE-SEM and PL were used to characterize phase structure, microstructure and luminescent properties of Y2O3 ： Eu3 phosphor. The results indicate that the best doping ratio of Kisn （Y 3 ） ： n （Eu3 ） ： n （K ） = 25 ： 1 ： 1. The luminescent intensity increases by 19. 1 % and the quantum eeficiency increases by 27. 1 % than Y2O3 ： Eu3 phosphor without K doping.