摘要
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 syn- thesized 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 SrB6010. 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/E→6H13/2 transitions, respectively. The emission intensity of the 4F9/E→6H15/2 transition under 349 nm excitation related to Dy3＋ doping concentration （x val- ue） , 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-xB6O10：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 whitelight, 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.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2013年第5期590-594,共5页
Chinese Journal of Luminescence
基金
河北省秦皇岛市科学技术局基金(201101A023)
河北科技师范学院创新团队基金(CXTD 2012-05)资助项目
