Rare earth-free high color rendering white light-emitting diodes using CsVO3 with highest quantum efficiency for vanadate phosphors

2015 ◽  
Vol 3 (41) ◽  
pp. 10748-10754 ◽  
Author(s):  
Tomohiko Nakajima ◽  
Masahiko Isobe ◽  
Yuko Uzawa ◽  
Tetsuo Tsuchiya
Keyword(s):  
Rare Earth ◽  
Quantum Efficiency ◽  
Internal Quantum Efficiency ◽  
White Led ◽  
Red Phosphor ◽  
Light Emitting ◽  
Color Rendering Index ◽  
White Light Emitting Diodes ◽  
Color Rendering ◽  
Very High

Internal quantum efficiency of CsVO3 was considerably enhanced up to 95.8%, and a rare earth free white LED that had a very high color rendering index of 91.1 was realized by using CsVO3 and a deep red phosphor Mg2TiO4:Mn4+.

K2Ln(PO4)(WO4):Tb3+,Eu3+ (Ln = Y, Gd and Lu) phosphors: highly efficient pure red and tuneable emission for white light-emitting diodes

2015 ◽  
Vol 3 (9) ◽  
pp. 2107-2114 ◽  
Author(s):  
Dawei Wen ◽  
Jiajun Feng ◽  
Junhao Li ◽  
Jianxin Shi ◽  
Mingmei Wu ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
White Light ◽  
Light Emitting Diodes ◽  
Internal Quantum Efficiency ◽  
Red Phosphor ◽  
Light Emitting ◽  
Highly Efficient ◽  
White Light Emitting Diodes

K2Tb0.5Eu0.5(PO4)(WO4) red phosphor with an internal quantum efficiency of 76.45% is produced. Furthermore, the luminescence colour can be tuned from green to red by adjusting the ratio of Tb3+ and Eu3+.

Red Phosphor Rb2NbOF5:Mn4+ for Warm White Light-Emitting Diodes with a High Color-Rendering Index

2018 ◽  
Vol 58 (1) ◽  
pp. 456-461 ◽  
Author(s):  
Zhengliang Wang ◽  
Zhiyu Yang ◽  
Zhaofeng Yang ◽  
Qianwen Wei ◽  
Qiang Zhou ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Red Phosphor ◽  
Light Emitting ◽  
Warm White Light ◽  
Color Rendering Index ◽  
White Light Emitting Diodes ◽  
Color Rendering

High color rendering index warm white light emitting diodes fabricated from AgInS2/ZnS quantum dot/PVA flexible hybrid films

2016 ◽  
Vol 18 (46) ◽  
pp. 31634-31639 ◽  
Author(s):  
Lan Wang ◽  
Xiaojiao Kang ◽  
Daocheng Pan
Keyword(s):  
Quantum Dot ◽  
White Light ◽  
White Led ◽  
Hybrid Films ◽  
Light Emitting ◽  
Warm White Light ◽  
Luminescent Films ◽  
Color Rendering Index ◽  
White Light Emitting Diodes ◽  
Color Rendering

A high color rendering warm-white LED is fabricated by fixing suitable thicknesses of the green and red AIS/ZnS QD/PVA luminescent films on top of a conventional blue InGaN chip.

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