Effect of Reassembled Remote Phosphor Geometry on the Luminous Efficiency and Spectra of White Light-Emitting Diodes With Excellent Color Rendering Property

2016 ◽  
Vol 63 (3) ◽  
pp. 1117-1121 ◽  
Author(s):  
Shang-Ping Ying ◽  
Huan-Yu Chien
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Luminous Efficiency ◽  
Light Emitting ◽  
Remote Phosphor ◽  
White Light Emitting Diodes ◽  
Color Rendering ◽  
Excellent Color

Effect of phosphor geometry on the luminous efficiency of high-power white light-emitting diodes with excellent color rendering property

2008 ◽  
Vol 34 (1) ◽  
pp. 1 ◽  
Author(s):  
Yu-Ho Won ◽  
Ho Seong Jang ◽  
Kyoung Woo Cho ◽  
Yong Seon Song ◽  
Duk Young Jeon ◽  
...  
Keyword(s):  
White Light ◽  
High Power ◽  
Light Emitting Diodes ◽  
Luminous Efficiency ◽  
Light Emitting ◽  
White Light Emitting Diodes ◽  
Color Rendering ◽  
Excellent Color

scholarly journals (Y,Gd)BO3:Eu red phosphor for dual-layer phosphor structure to enhance the optical performance of white light-emitting diodes

2021 ◽  
Vol 10 (4) ◽  
pp. 1930-1935
Author(s):  
Phan Xuan Le ◽  
Le Hung Tien
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Phosphor Layer ◽  
Light Emitting ◽  
Conformal Coating ◽  
Color Quality ◽  
Remote Phosphor ◽  
White Light Emitting Diodes ◽  
Color Rendering

Among the structures using for fabricating white light-emitting diodes (WLEDs) such as the conformal coating or in-cup geometries, the remote phosphor structure gives the highest luminous efficacy. However, in terms of color quality, its performance is not as good as the others. The red-light compensation has been reported as the effective solution for enhancing the color quality of WLEDs. Hence, this study adopted the idea and applied to the dual-layer phosphor structure. The phosphor used to boost the red color in light formation is (Y,Gd)BO3:Eu particle. The dual-layer remote phosphor structure was simulated with the red (Y,Gd)BO3:Eu phosphor layer above the original yellow phosphor YAG:Ce3+ one. The WLEDs with different correlated color temperatures of 5600 K, 6600 K and 7700K were experimented. Mie-theory and Lambert-Beer law were applied to examine the results. The growth in color rendering index (CRI) and color quality scale (CQS) with the increase of (Y,Gd)BO3:Eu phosphor concentration was observed. Nevertheless, the lumen efficacy would be degraded if the concentration was over a certain number. The information provided in this article is useful for the development of high-power WLED production with greater color quality.

White Light-Emitting Diodes with Excellent Color Rendering Based on Organically Capped CdSe Quantum Dots and Sr3SiO5:Ce3+,Li+Phosphors

2008 ◽  
Vol 20 (14) ◽  
pp. 2696-2702 ◽  
Author(s):  
Ho Seong Jang ◽  
Heesun Yang ◽  
Sung Wook Kim ◽  
Ji Yeon Han ◽  
Sang-Geun Lee ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emitting Diodes ◽  
Cdse Quantum Dots ◽  
Light Emitting ◽  
White Light Emitting Diodes ◽  
Color Rendering ◽  
Excellent Color
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