采用高温固相法制备了Sr1-xB6O10∶xDy3+材料, 研究了Dy3+掺杂浓度对Sr1-xB6O10∶xDy3+材料发射光谱的影响。在349 nm紫外光激发下, Sr1-xB6O10∶xDy3+材料的发射光谱均呈双峰发射, 分别为4F9/2→6H15/2的蓝光和4F9/2→6H13/2的黄光。随着掺杂浓度的增大, Dy3+的4F9/2→6H15/2跃迁产生的蓝光发射峰强度先增大, 在4%时达到最大值, 之后减小。样品的色坐标位于蓝白色区, 当Dy3+的摩尔分数为2%, 4%, 6%, 8%, 10%时相对应的色坐标分别位于A(0.263, 0.317)、B(0.243, 0.321)、C(0.233, 0.317)、D(0.248, 0.296)、E(0.267, 0.325)。

A novel white-light emission for full color emission Sr1-xB6O10∶xDy3+ phosphor was synthesized at 900 ℃ in air by solid-state reaction route. The crystal structure and photoluminescence proerties were characterized by XRD and fluorescence spectra, respectively. The results show that the incorporation of Dy3+ ions do not change the single-phase structure of SrB6O10. The PL spectra show the excitation peaks range from 300 to 400 nm is due to the 4f-4f transitions of Dy3+. This mercury-free excitation is useful for solid state lighting and light-emitting diodes (LEDs). The emission of Dy3+ ions upon 349 nm excitation is observed at 484 nm (blue) due to the 4F9/2→6H15/2 transitions, 579 nm (yellow) due to 4F9/2→6H13/2 transitions, respectively. The emission intensity of the 4F9/2→6H15/2 transition under 349 nm excitation related to Dy3+ doping concentration (x value),which increases rapidly with the increase of Dy3+ concentration, and reaches a maximum value at 4%, then decreases with increasing Dy3+ ions due to the concentration quenching. For Sr1-x-B6O10∶xDy3+ phosphor, the three-dimensional network of BO4 tetrahedra acts as a shield. It can isolate the Dy ions from each other, and resist the concentration quenching. By simulation of white light, the CIE chromaticity coordinates for Sr1-xB6O10∶xDy3+ phosphors located in the bluish-white region. All the results imply that the Sr1-xB6O10∶xDy3+ phosphors could be potentially used as white LEDs.