Enhance Color Rendering Index via Full Spectrum Employing the Important Key of Cyan Phosphor

2016 ◽  
Vol 8 (45) ◽  
pp. 30677-30682 ◽  
Author(s):  
Mu-Huai Fang ◽  
Chenchen Ni ◽  
Xuejie Zhang ◽  
Yi-Ting Tsai ◽  
Sebastian Mahlik ◽  
...  
Keyword(s):  
Full Spectrum ◽  
Color Rendering Index ◽  
Color Rendering

A design methodology for phosphor mixtures for tunable spectrum LEDs

MRS Advances ◽  
2016 ◽  
Vol 1 (50) ◽  
pp. 3435-3440 ◽  
Author(s):  
Partha S. Dutta ◽  
Kathryn M. Liotta
Keyword(s):  
Design Methodology ◽  
Emission Spectra ◽  
Full Spectrum ◽  
Light Emitting ◽  
White Leds ◽  
Fixed Weight ◽  
Wide Range ◽  
Color Rendering Index ◽  
White Light Emitting Diodes ◽  
Color Rendering

ABSTRACT Spectrum tuning in phosphor converted white light emitting diodes (pc-WLED) is done by mixing powders of phosphor compounds (with different emission wavelengths) in different weight ratios. In this paper, a new methodology for designing unique full spectrum phosphor mixtures (with fixed weight ratios of different emission phosphor) has been presented that could provide a wide range of pc-WLED spectrum. This is done by optimizing the excitation and emission spectra of the phosphor compounds used in the mixture. A unique phosphor mixture comprising of Eu2+ and Ce3+-Na1+ activated compounds of SrGa2S4, CaGa2S4, SrS, CaS and CaF2 was used to produce full spectrum warm, neutral and cool white LEDs with color temperatures between 2500 K and 7500 K and with color rendering index exceeding 95.

Warm White Light with a High Color-Rendering Index from a Single Gd3Al4GaO12:Ce3+ Transparent Ceramic for High-Power LEDs and LDs

2018 ◽  
Vol 11 (2) ◽  
pp. 2130-2139 ◽  
Author(s):  
Shuang Liu ◽  
Peng Sun ◽  
Yongfu Liu ◽  
Tianliang Zhou ◽  
Shuxing Li ◽  
...  
Keyword(s):  
White Light ◽  
High Power ◽  
Transparent Ceramic ◽  
Warm White Light ◽  
Color Rendering Index ◽  
Color Rendering
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