橙红色荧光粉YPO4:Gd3+,Eu3+的制备及发光特性

Preparation and Luminescence Properties of Reddish-orange Phosphors YPO4:Gd3+,Eu3+

摘要:

采用高温固相法在1100℃下合成了橙红色荧光粉YPO₄:Gd₃₊,Eu₃₊,研究了Eu₃₊离子掺杂浓度、碱金属碳酸盐、助熔剂、敏化剂对荧光粉发光性能的影响。XRD检测结果显示：合成荧光粉为单相的YPO₄。Eu₃₊离子较佳掺杂浓度为2.5%,碱金属碳酸盐 Na₂CO₃能有效提高荧光粉的发光强度。添加助熔剂NH₄F可将荧光粉的煅烧合成温度从1100℃降低到800℃,并可促进发光中心进入晶格。Gd₃₊离子能将吸收的激发能有效传递给发光中心Eu₃₊离子,提高荧光粉的发光强度。色坐标分析显示,合成YPO₄:0.025Eu₃₊荧光粉色坐标为(0.61,0.39) ,位于橙红光的色坐标范围内。

Abstract:

The reddish-orange phosphors YPO₄:Gd₃₊,Eu₃₊ were synthesized with the high temperature solid-state method at 1100 ℃, and discussions were conducted in respect of the influences of Eu₃₊ ion doping concentration, alkali carbonate,flux and sensitizers on the luminescence properties of YPO₄:Eu₃₊. XRD analysis shows that the synthesized principal phosphor is of the single phase YPO₄. Eu3 + ions have a better doping concentration of 2.5%. Alkali carbonate Na₂CO₃ can effectively improve the photoluminescence intensity of the phosphor. The addition of flux NH₄F can reduce the phosphor calcination temperature from 1100 ℃ to 800 ℃ and facilitate the luminescence center into the crystal lattice. Gd₃₊ ion can effectively transfer the absorption energy to Eu₃₊ ions at the luminescent center, enhancing the luminescence intensity of the phosphor. The chromaticity coordinate analysis shows that the chromaticity coordinate of the phosphor YPO₄:0.025Eu₃₊is (0.61,0.39) which locates within the scope of the chromaticity coordinate of the standard reddish-orange point．