发光二极管用SrWO_4:Eu^(3+)红光荧光粉激发谱强度的调控

Excitation spectrum intensity adjustment of SrWO_4:Eu^(3+) red phosphors for light-emitting diode

采用化学共沉淀法制备了Eu3+掺杂摩尔分数不同、煅烧温度不同的SrWO4:Eu3+系列发光粉体,所制备的粉体均具有Eu3+特征的强室温红光荧光发射.通过调节煅烧温度和掺杂摩尔分数来调控近紫外和蓝光吸收强度,进而调控用395nm的近紫外光和465nm的蓝光激发样品所得红光发光强度.研究结果表明,所制备的SrWO4:Eu3+红光荧光粉可以被紫外和蓝光发光二极管有效激发,且可作为红光发光二极管用荧光粉.

The SrWO4：Eu3＋ red phosphors with different Eu3＋ doping concentrations and different sintering temperatures are prepared by the co-precipitation method.The powders as-prepared exhibit sharply red characteristic emissions of Eu3＋ ions at room temperature.The near-ultraviolet and blue light absorption intensities are controlled by adjusting sintering temperature and doping concentration and so the red emission intensities under the 395 or 465 nm excitation can be adjusted.Our results show that the SrWO4：Eu3＋ red phosphors can be effectively excited by the ultraviolet light,the near-ultraviolet （395 nm） light and 465 nm blue light.Therefore the SrWO4：Eu3＋ red phosphors may have a potential application to white light-emitting diodes.