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采用高温固相法制备了KCaPO4:Eu3+红色发光材料,研究了Eu3+掺杂浓度、电荷补偿剂等对材料发光性质的影响。结果显示,在397 nm近紫外光激发下,材料呈多峰发射,分别由Eu3+的5D0→7FJ(J=0,1,2,3,4)能级跃迁产生,主峰为613 nm;监测613 nm发射峰,所得激发光谱由O2-→Eu3+电荷迁移带(200~350 nm)和f-f高能级跃迁吸收带(350~450 nm)组成,主峰为397 nm。Eu3+离子的最佳掺杂浓度为5%(摩尔分数);浓度猝灭机制为电偶极-电偶极相互作用。添加电荷补偿剂Li+,Na+,K+或Cl-后,可提高KCaPO4:Eu3+材料的发射强度,其中以添加Li+时,效果最明显。
The KCaPO4: Eu3 + red luminescence material was prepared by high temperature solid-state method. The effects of Eu3 + doping concentration and charge compensation agent on the luminescent properties of the material were studied. The results show that the material is multimodal when excited by near-UV light at 397 nm, and is produced by the 5D0 → 7FJ (J = 0,1,2,3,4) level transition of Eu3 + with the main peak of 613 nm. nm emission peak. The resulting excitation spectrum consists of the transition band O2- → Eu3 + (200-350 nm) and the ff high energy transition band (350-450 nm) with the main peak of 397 nm. The optimum doping concentration of Eu3 + ions is 5% (molar fraction). The quenching mechanism of the concentration is the electric dipole-dipole interaction. Adding charge compensation agent Li +, Na +, K + or Cl- can increase the emission intensity of KCaPO4: Eu3 +, and the most obvious effect is when Li + is added.