【作者】 程丽红； 赖华生； 陈宝玖；

【Author】 CHENG Li-hong ,LAI Hua-sheng, CHEN Bao-jiu (Department of Physics, Dalian Maritime University, Dalian 116023, China; Jiangxi South Rare-Earth High-Tech. Co. , Ltd. , Ganzhou 341000, China)

【机构】 大连海事大学物理系； 江西南方稀土高技术股份有限公司；

【摘要】 采用氨水、双氧水和磷酸氢二铵溶液作沉淀剂,通过共沉淀法制备出Y(P,V)O4:Tm3+荧光粉, 利用XRD、SEM、紫外以及真空紫外激发下的发射光谱对其进行研究。结果表明:共沉淀法制备的Y(P, V)O4:Tm3+荧光粉的颗粒形貌好,在147nm真空紫外光和254nm紫外光激发下,荧光粉发射主峰位于 476nm,色坐标范围为:0．167≤x≤0．200,0．146≤y≤ 0．183。从这些结果来看,Y(P,V)O4:Tm3+体系还不能满足实际应用的要求,仍需进一步的深入研究以改善其性能。更多还原

【Abstract】 Much attention has been paid to the search for high-efficient phosphor since the plasma display panels (PDP) edged competitively in the market of large flat panel display. The commercial PDP blue phosphor BaM gA110O17:Eu2+suffers from decreasing performance of brightness and color because of the serious processing thermal degradation and timing deterioration. New blue phosphor with jarless activated ion may be a better way to solve this problem. In the lanthanide series, Tm3+may be a feasible candidate for the blue emissions origina ting from 1D2→3 H4 (around 450nm) , 1G4→H6(around 480nm) transitions. Conventionally, the phosphor production is prepared using solid-state reactions between oxide sources at high temperature. However, it is difficult to control over particles size and morphology, uniform dopant con centration. On the contrary to conventional methods, aerosol synthesis technique has been employed successfully to prepared phosphor particles with good morphology in recent years. By coprecipitation reaction, high quality Y(P,V)O4 : Tm3+phosphor was prepared. The phosphor was characterized by XRD, SEM, and photolumi-nescence under VUV (147nm) or UV (254nm) excitation. The XRD patterns disclosed that the obtained Y(P, V)O4 : Tm3+is not a mixture, but a compound. The SEM image showed that the size of the phosphor particles is uniform and submicron, and the morphology is regular and no agglomeration found. Under VUV and UV excitation, there are two emission peaks for most phosphors observed, the narrow one at 475nm originates from the Tm3+ ion transition 1G4→ 3H6, and the weak broad-band around 430nm belongs to VO4 3- group. With increasing Tm3+concentration, the narrow peak intensity enhanced while the Tm3+ concentration is lower than 0. 005 in mole. When the Tm3+concentration is higher than 0. 005, the intensity of the transition 1G4→ 3H6 decreases with increasing Tm3+concentration. The intensity of broad-band decreases with Tm3+concentration in full studied concentration region. It is expected that Y(P, V)O4: Tm3+ would be a promising candidate for PDP phosphors.更多还原