Enhanced color conversion efficiency of remote phosphor-converted light-emitting diodes using micro-concavity arrays

2018 ◽  
Author(s):  
Shudong Yu ◽  
Yong Tang ◽  
Zongtao Li ◽  
Junchi Chen ◽  
Uli Lemmer ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Remote Phosphor ◽  
Color Conversion

scholarly journals Color-conversion efficiency enhancement of quantum dots via selective area nano-rods light-emitting diodes

2016 ◽  
Vol 24 (17) ◽  
pp. 19978 ◽  
Author(s):  
Che-Yu Liu ◽  
Tzu-Pei Chen ◽  
Tsung Sheng Kao ◽  
Jhih-Kai Huang ◽  
Hao-Chung Kuo ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Conversion Efficiency ◽  
Light Emitting Diodes ◽  
Efficiency Enhancement ◽  
Light Emitting ◽  
Selective Area ◽  
Nano Rods ◽  
Color Conversion

Using an embedded nanocomposite layer to increase color-conversion efficiency of organic light-emitting diodes

2014 ◽  
Vol 15 (9) ◽  
pp. 1906-1912 ◽  
Author(s):  
Chih-Hao Chang ◽  
Yu-Jhong Lo ◽  
Jun-Lin Huang ◽  
Yu-Fang Huang ◽  
Hsin-Yu Hung ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Nanocomposite Layer ◽  
Organic Light ◽  
Color Conversion

scholarly journals Increased Color-Conversion Efficiency in Hybrid Light-Emitting Diodes utilizing Non-Radiative Energy Transfer

2010 ◽  
Vol 22 (5) ◽  
pp. 602-606 ◽  
Author(s):  
Soontorn Chanyawadee ◽  
Pavlos G. Lagoudakis ◽  
Richard T. Harley ◽  
Martin D. B. Charlton ◽  
Dmitri V. Talapin ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Conversion Efficiency ◽  
Light Emitting Diodes ◽  
Radiative Energy ◽  
Light Emitting ◽  
Radiative Energy Transfer ◽  
Color Conversion

scholarly journals Improvement in Color-Conversion Efficiency and Stability for Quantum-Dot-Based Light-Emitting Diodes Using a Blue Anti-Transmission Film

Nanomaterials ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 508 ◽  
Author(s):  
Jiasheng Li ◽  
Yong Tang ◽  
Zongtao Li ◽  
Xinrui Ding ◽  
Shudong Yu ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Conversion Efficiency ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Color Conversion

Butterfly-inspired micro-concavity array film for color conversion efficiency improvement of quantum-dot-based light-emitting diodes

2017 ◽  
Vol 42 (23) ◽  
pp. 4962 ◽  
Author(s):  
Shudong Yu ◽  
Baoshan Zhuang ◽  
Junchi Chen ◽  
Zongtao Li ◽  
Longshi Rao ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Conversion Efficiency ◽  
Light Emitting Diodes ◽  
Efficiency Improvement ◽  
Light Emitting ◽  
Color Conversion

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.

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