峰值波长和浓度对转光膜与白光LED发光性能的影响  

The Influence of Peak Wavelength and Concentration on the Luminous Performance of Light Conversion Film and WLED

作　　者：于敏丽 徐小华 尤燕飞 YU Minli;XU Xiaohua;YOU Yanfei(Department of Electrical Engineering,Hebei Vocational University of Technology and Engineering,Xingtai Hebei 054035,China)

机构地区：[1]河北科技工程职业技术大学电气工程系,河北邢台054035

出　　处：《电子器件》2022年第3期677-681,共5页Chinese Journal of Electron Devices

摘　　要：以高折射率有机硅胶和无机Y_(3)Al_(5)O_(12):Ce^(3+)发光材料为原料,采用加热固化的方法制备出有机/无机转光膜,系统地研究了发光材料的峰值波长和浓度对转光膜和制备的白光LED光色性能的影响,并进行了机理分析。研究结果表明:不同峰值波长变量中,545 nm对应白光LED最大的光通量,这是由于其光谱与人眼明视觉曲线具有最大的重叠面积;不同浓度数值中,由于存在发光材料的吸收饱和现象,在9%浓度时白光LED达到最大的光通量;色温则与浓度变化呈现单向递减趋势;色坐标和光色均匀度则随着浓度的提高而提高。综合多种指标获得本研究的最佳工艺参数如下:峰值波长为545 nm,浓度为9%,对应白光LED器件光通量为131.5 lm,色温为4551 K,色坐标为(0.3479,0.3758),光色位置处于黑体辐射曲线的白光区,这说明了转光膜在白光LED领域应用的可行性。Organic/inorganic light conversion films are prepared by using heating and curing methods with the luminescent materials of organic silica gel with high reflactive index and inorganic Y_(3)Al_(5)O_(12):Ce^(3+) as raw materials.The influence of the peak wavelength and concentration of luminescent materials on the light and color performance of the light conversion films and the prepared WLED is systematically studied,and the mechanism is analyzed.The research results show that among different peak wavelength values,545 nm corresponds to the maximum luminous flux of WLEDs,which is due to the fact that its spectrum has the largest overlap area with the human vision curve among different concentration values,the maximum luminous flux of WLED is achieved at 9%concentration due to the absorption saturation phenomenon of the luminescent material,the color temperature and the concentration change show a one-way decreasing trend,and the color coordinate and light color uniformity increase with the raise of the concentration.The best process parameter in this study is obtained by combining multiple indicators as the peak value,i.e.,the wavelength is 545 nm,the concentration is 9%,the corresponding WLED device luminous flux is 131.5 lm,the color temperature is 4551 K,the color coordinates are(0.3479,0.3758),and the light color position is in the white light region of the black body radiation curve,which illustrates the feasibility of the application of light conversion film in the WLED field.

关 键 词：白光LED 转光膜 峰值波长 浓度 光通量 色温 色坐标 

分 类 号：TN312[电子电信—物理电子学]