Fabrication of Flexible White Light-Emitting Diodes from Photoluminescent Polymer Materials with Excellent Color Quality

2017 ◽  
Vol 9 (40) ◽  
pp. 35279-35286 ◽  
Author(s):  
Huang-Yu Lin ◽  
Chin-Wei Sher ◽  
Chih-Hao Lin ◽  
Hsien-Hao Tu ◽  
Xin Yin Chen ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Polymer Materials ◽  
Light Emitting ◽  
Color Quality ◽  
White Light Emitting Diodes ◽  
Excellent Color

Excellent Color Quality of White-Light-Emitting Diodes by Embedding Quantum Dots in Polymers Material

2016 ◽  
Vol 22 (1) ◽  
pp. 35-41 ◽  
Author(s):  
Huang-Yu Lin ◽  
Sheng-Wen Wang ◽  
Chien-Chung Lin ◽  
Kuo-Ju Chen ◽  
Hau-Vei Han ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Color Quality ◽  
White Light Emitting Diodes ◽  
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.

scholarly journals Mining Unexplored Chemistries for Phosphors for High-Color-Quality White-Light-Emitting Diodes

Joule ◽  
2018 ◽  
Vol 2 (5) ◽  
pp. 914-926 ◽  
Author(s):  
Zhenbin Wang ◽  
Jungmin Ha ◽  
Yoon Hwa Kim ◽  
Won Bin Im ◽  
Joanna McKittrick ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Color Quality ◽  
White Light Emitting Diodes

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

Synthesis of narrow-band red-emitting K2SiF6:Mn4+ phosphors for a deep red monochromatic LED and ultrahigh color quality warm-white LEDs

2015 ◽  
Vol 3 (3) ◽  
pp. 607-615 ◽  
Author(s):  
Ji Hye Oh ◽  
Heejoon Kang ◽  
Yun Jae Eo ◽  
Hoo Keun Park ◽  
Young Rag Do
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Narrow Band ◽  
Light Emitting ◽  
White Leds ◽  
Color Quality ◽  
Warm White Light ◽  
White Light Emitting Diodes

In this study, we synthesized and characterized narrow-band red-emitting K2SiF6:Mn4+ phosphors in order to improve the color qualities of warm white light-emitting diodes (LEDs).

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