Spectroscopy and Spectral Analysis, Volume. 38, Issue 8, 2337(2018)
Preparation and Spectral Properties of White Light Emitting LED Based on Layered Remote Phosphor Film
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.
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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
Received: Jul. 22, 2017
Accepted: --
Published Online: Aug. 26, 2018
The Author Email: Ning-ze ZHUO (zhuoningze89@163.com)