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采用以柠檬酸作为螯合剂的溶胶–凝胶法成功制备了新型纳米级红色荧光粉Ca0.5Sr0.5MoO4:Eu3+。通过X射线衍射、扫描电镜和荧光光谱等对该荧光粉进行了表征。结果表明:该荧光粉平均粒径为700 nm,在近紫外区395 nm和蓝光区467 nm光激发下都可发射出615 nm处的强烈红光,此外,Ca0.5Sr0.5MoO4:Eu3+中Eu3+离子的最佳掺杂量为10%、最佳烧结温度为1 000℃、助熔剂Na+的引入使样品的发光强度增加了5倍。Ca0.5Sr0.5MoO4:Eu3+荧光粉是一种潜在的白光发光二极管用红色荧光粉。
A novel nano-scale red phosphor Ca0.5Sr0.5MoO4: Eu3 + was successfully prepared by sol-gel method using citric acid as a chelating agent. The phosphor was characterized by X-ray diffraction, scanning electron microscopy and fluorescence spectroscopy. The results show that the average particle size of the phosphor is 700 nm, and strong red emission at 615 nm can be obtained under the excitation of 395 nm in the near ultraviolet region and 467 nm in the blue region. In addition, the Eu3 + ions in Ca0.5Sr0.5MoO4: Eu3 + The optimum doping amount of ions is 10%, the optimum sintering temperature is 1 000 ℃, and the introduction of flux Na + increases the luminescence intensity of the sample by 5 times. Ca0.5Sr0.5MoO4: Eu3 + phosphor is a potential white light emitting diode with red phosphor.