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以主波长为535 nm的(Lu,Y)AG:Ce绿粉和主波长为625 nm的(Ca,Sr)Al Si N3:Eu红粉为研究对象,研究其复合荧光粉的光谱耦合性质和封装LED器件光效、色坐标和色温性能。复合荧光粉以绿粉比红粉为1.1:0.1、1.2:0.1、1.3:0.1、1.4:0.1这四种比例复合而成,随绿红比增加,复合荧光粉发光色坐标在色坐标图上线性变化,根据光学耦合特点,快速得到了2 500 K、2 700 K、3 000 K色温的LED封装需要的绿粉和红粉的比例,结果显示采用该两种粉获得的3 000 K色温的LED器件光通量、光效、显色指数等性能均最佳。
The (Lu, Y) AG: Ce green powder with the main wavelength of 535 nm and the (Ca, Sr) Al Si N3: Eu red powder with the main wavelength of 625 nm were studied to study the spectral coupling properties of the composite phosphors and their encapsulation LED device luminous efficiency, color coordinates and color temperature performance. Composite phosphor with green powder than red powder 1.1: 0.1,1.2: 0.1,1.3: 0.1,1.4: 0.1 of these four kinds of composite ratio, with the green-red ratio, the composite phosphor luminescent color coordinates on the color chart linear According to the optical coupling characteristics, the ratio of green powder and red powder required for LED packages of 2 500 K, 2 700 K and 3 000 K is rapidly obtained. The results show that the 3 000 K color temperature LED devices Luminous flux, luminous efficiency, color rendering index and other properties are the best.