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机构地区:[1]北京工业大学应用数理学院
出 处:《光谱实验室》2013年第1期46-48,共3页Chinese Journal of Spectroscopy Laboratory
基 金:国家自然科学基金(No.10804005)
摘 要:使用高温固相法制备了La_(7(1-x))P_3O_(18):xDy^(3+)发光材料,在347nm激发下,其发射峰分别为480、578、664nm,分别对应离子Dy^(3+)能级内的~4F_(9/2)→~6H_(15/2)、~6H_(13/2)和~6H_(11/2)跃迁。随着Dy^(3+)浓度的增加,黄光和蓝光的强度的比值逐渐减小,当Dy^(3+)浓度为2mol%时,发光强度最大,计算出的色坐标处于白光区域内(0.33,0.33),该材料的发光颜色随Dy^(3+)浓度的变化而在白光区域内改变,因此,该材料可作为紫外激发的白色发光材料。The La_(7(1-x)P_3O_(18):xDy^(3+)(0≤X≤0.08) luminescent materials were synthesized by high temperature solid-state reaction.The emission peaks of La_(7(1-x)P_3O_(18)= xDy^(3+) were respectively 480,578nm and 664nm,corresponding ~4F_(9-2)→~6H_(15/2),~6H_(13/2),~6H_(11/2) transition of Dy^(3+) energy level under 347nm excitation.The intensity ratio of yellow light and blue light gradually decreased along with increasing Dy^(3+) concentration,when Dy^(3+) concentration was 2mol%,luminous intensity was the largest,the calculated chromaticity coordinates lie white light area(0.33,0.33).The luminescent colors of this material varied with the change of Dy^(3+) concentration in the white light area.The material may be used as white light luminescent materials under ultraviolet excitation.
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