光谱学与光谱分析, 2018, 38 (8): 2337, 网络出版: 2018-08-26
基于分层远程荧光膜白光LED的制备及光谱性能研究
Preparation and Spectral Properties of White Light Emitting LED Based on Layered Remote Phosphor Film
分层远程荧光膜 白光LED 辐射发光效率 色保真度 色域指数 Layered remote phosphor film White LED Luminescent efficiency of radiation Color fidelity Color gamut index
摘要
基于荧光粉分层和远程荧光封装技术, 采用热压法制备出双层远程荧光膜, 并封装出白光LED。 通过荧光分光光度计和可见光光谱分析系统研究了绿色和红色远程荧光膜不同分层顺序及不同发射波长对于白光LED光谱性能的影响。 研究发现: 蓝-绿-红(B-G-R)膜层封装形式相较于蓝-红-绿(B-R-G)辐射发光效率提高了31.69%, 色保真度和色域指数均随着红色远程荧光膜波长的增加而升高, 发射波长为660 nm时制备的白光LED色保真度最高值达到91, 色域指数最高值达到104, 辐射发光效率值则与波长成反比关系; 色保真度随着绿色远程荧光膜波长的增加逐渐降低, 色域指数则先降低后升高, 发射波长为530 nm制备的白光LED具有最高的辐射发光效率, 达到300.7 lm·W-1。 研究所得出的相关结论对于实际的应用具有一定的参考意义。
Abstract
Based on layered phosphor and remote phosphor packaging technology, double layer remote phosphor film were prepared by hot pressing method, and the films then were packaged into white LED. Fluorescence spectrophotometer and the visible spectrum analysis system were used to study the influence on the white LED spectral properties of the layer order of green and red remote phosphor films and emission wavelength. Results showed that the luminescent efficiency of radiation of blue-green-red type package structure compared to the blue-red-green type package structure was improved by 31.69%, and the color fidelity and color gamut index increased with the increasing of red remote phosphor film wavelength. With emission wavelength 660nm, the color fidelity and color gamut index of prepared white LED reached the highest value 91 and 104 respectively. In contrast, luminescent efficiency of radiation was inversely proportional to the wavelength; color fidelity decreased with the increasing of green remote phosphor film wavelength, and color gamut index raised first, then decreased, when emission wavelength was 530 nm, with the luminescent efficiency of radiation of prepared white LED reaching the highest value 300.7 lm·W-1. Finally, the related conclusions of present study had a certain reference value for the actual application.
卓宁泽, 张娜, 陈永浩, 蒋鹏, 程少文, 朱月华, 王海波. 基于分层远程荧光膜白光LED的制备及光谱性能研究[J]. 光谱学与光谱分析, 2018, 38(8): 2337. ZHUO Ning-ze, ZHANG Na, CHEN Yong-hao, JIANG Peng, CHENG Shao-wen, ZHU Yue-hua, WANG Hai-bo. Preparation and Spectral Properties of White Light Emitting LED Based on Layered Remote Phosphor Film[J]. Spectroscopy and Spectral Analysis, 2018, 38(8): 2337.