Kuo Te-Wen, Huang Chien-Hao, Chen Teng-Ming
Phosphors Research Laboratory and Department of Applied Chemistry,National Chiao Tung University, Hsinchu 30010, Taiwan, China.
Appl Opt. 2010 Aug 1;49(22):4202-6. doi: 10.1364/AO.49.004202.
We synthesized a violet-blue phosphor Ba(2)AlB(4)O(9)Cl:Eu(2+) with a solid-state reaction. The excitation and emission spectra of this phosphor showed that all were broadband due to 4f(7)-4f(6)d(1) transitions of Eu(2+). The phosphors with different Eu(2+) concentrations presented violet-blue luminescence for ultraviolet [(UV) 250-390nm] excitation. The optimum concentration of Eu(2+) in Ba(2)AlB(4)O(9)Cl:Eu(2+) is determined to be 6mol.%. The luminous efficiency was found to be 8.1lm/W for the violet-blue fluorescent lamp and 3.2lm/W for the violet-blue phosphor-converted light-emitting diode, respectively. Ba(2)AlB(4)O(9)Cl:Eu(2+) would be a promising phosphor for converting the UV radiation to violet-blue emission for a novel high light-conversion efficiency phototherapy illuminator.
我们通过固态反应合成了一种紫蓝色荧光粉Ba₂AlB₄O₉Cl:Eu²⁺。该荧光粉的激发光谱和发射光谱表明，由于Eu²⁺的4f⁷-4f⁶d¹跃迁，所有光谱均为宽带。不同Eu²⁺浓度的荧光粉在紫外光（250 - 390nm）激发下呈现紫蓝色发光。确定Ba₂AlB₄O₉Cl:Eu²⁺中Eu²⁺的最佳浓度为6mol%。发现紫蓝色荧光灯的发光效率分别为8.1lm/W，紫蓝色荧光粉转换发光二极管的发光效率为3.2lm/W。Ba₂AlB₄O₉Cl:Eu²⁺有望成为一种用于将紫外线辐射转换为紫蓝色发射的荧光粉，用于新型高光转换效率的光疗照明器。
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