Highly efficient Ce3+ → Tb3+ energy transfer induced bright narrowband green emissions from garnet-type Ca2YZr2(AlO4)3:Ce3+,Tb3+ phosphors for white LEDs with high color rendering index

2019 ◽  
Vol 7 (34) ◽  
pp. 10471-10480 ◽  
Author(s):  
Liangling Sun ◽  
Balaji Devakumar ◽  
Jia Liang ◽  
Shaoying Wang ◽  
Qi Sun ◽  
...  
Keyword(s):  
Energy Transfer ◽  
White Leds ◽  
Highly Efficient ◽  
Color Rendering Index ◽  
Color Rendering

Highly efficient Ce3+ → Tb3+ energy transfer induced bright narrowband green emissions from Ca2YZr2(AlO4)3:Ce3+,Tb3+ garnet phosphors, which showed great potential for application in warm-white LEDs with high color rendering index.

Color-tunable Al6Si2O13:Eu2+,Mn2+ phosphor with high color rendering index based on energy transfer for warm white LEDs

2018 ◽  
Vol 42 (18) ◽  
pp. 15207-15214 ◽  
Author(s):  
Bo Yan ◽  
Gui-Gen Wang ◽  
Long-Fei Liu ◽  
Xin-Zhong Wang ◽  
You-Xiao Chen ◽  
...  
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
White Led ◽  
Light Emitting ◽  
White Leds ◽  
Warm White Light ◽  
Color Tunable ◽  
Color Rendering Index ◽  
Color Rendering

A type of warm-white-light-emitting Al6Si2O13:Eu2+,Mn2+ phosphor with high color rendering index was synthesized for UV-excited white LED.

Single-composition white-emitting NaSrBO3:Ce3+,Sm3+,Tb3+phosphors for NUV light-emitting diodes

2015 ◽  
Vol 3 (28) ◽  
pp. 7286-7293 ◽  
Author(s):  
Ming Xin ◽  
Datao Tu ◽  
Haomiao Zhu ◽  
Wenqin Luo ◽  
Zhuguang Liu ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Light Emitting ◽  
White Leds ◽  
Highly Efficient ◽  
Color Rendering Index ◽  
Color Rendering

Highly efficient single-composition white-emitting phosphors based on NaSrBO3:Ce3+,Sm3+,Tb3+have been developed for the fabrication of near-UV excited white LEDs with a high color rendering index.

scholarly journals Multicolor and Warm White Emissions with a High Color Rendering Index in a Tb3+/Eu3+-Codoped Phosphor Ceramic Plate

Materials ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2240
Author(s):  
Haggeo Desirena ◽  
Jorge Molina-González ◽  
Octavio Meza ◽  
Priscilla Castillo ◽  
Juan Bujdud-Pérez
Keyword(s):  
Energy Transfer ◽  
Light Emitting Diode ◽  
Maximum Energy ◽  
Luminescence Spectra ◽  
Ceramic Plate ◽  
Light Emitting ◽  
White Leds ◽  
Near Ultraviolet ◽  
Color Rendering Index ◽  
Color Rendering

A series of Tb3+/Eu3+-codoped phosphor ceramic plates with a high color rendering index (CRI) for a near-ultraviolet light emitting diode (LED) were fabricated. Color emission can be tuned from green to reddish as a function of Eu3+ concentration. By doping only 0.15 mol% of Eu3+ concentration, a comfortable warm white emission is promoted as a result of simultaneous emissions of Tb3+ and Eu3+ ions. A theoretical model is proposed to calculate the contributions of the emitted color of the donor (Tb3+) and acceptor (Eu3+) ions in terms of europium concentration. The energy transfer from Tb3+ to Eu3+ ions is corroborated by the luminescence spectra and decay time of Tb3+, with a maximum energy transfer efficiency of 76% for 28 mol% of Tb3+ and 14 mol% of Eu3+. Warm white LEDs were constructed using a 380 nm UV chip and showed a CRI of 82.5, which was one of highest values reported for Tb3+/Eu3+-codoped samples. Color-correlated temperature (CCT), color coordinate (CC), and luminous efficacy (LE) were utilized to know the potentials as a phosphor converter in solid-state lighting.

Tunable white light of a Ce3+,Tb3+,Mn2+ triply doped Na2Ca3Si2O8 phosphor for high colour-rendering white LED applications: tunable luminescence and energy transfer

2017 ◽  
Vol 46 (28) ◽  
pp. 9272-9279 ◽  
Author(s):  
Wei Lü ◽  
Huawei Xu ◽  
Jiansheng Huo ◽  
Baiqi Shao ◽  
Yang Feng ◽  
...  
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
White Led ◽  
White Leds ◽  
Full Color ◽  
Color Rendering Index ◽  
Color Rendering ◽  
Colour Rendering

We report a full-color emitting Na2Ca3Si2O8:Ce3+,Tb3+,Mn2+ phosphor with a high color rendering index for UV white LEDs.

Enhancing the Color Rendering Index for Phosphor‐converted White LEDs Using Cadmium‐Free CuInS2/ZnS QDs

2013 ◽  
Vol 60 (7) ◽  
pp. 801-806 ◽  
Author(s):  
Po‐Hsiang Chuang ◽  
Chun Che Lin ◽  
Heesun Yang ◽  
Ru‐Shi Liu
Keyword(s):  
White Leds ◽  
Color Rendering Index ◽  
Color Rendering

scholarly journals Photoluminescence tuning of Ca8−xSrxMgGd(PO4)7:Eu2+,yMn2+ phosphors for applications in white LEDs with excellent color rendering index

RSC Advances ◽  
2017 ◽  
Vol 7 (31) ◽  
pp. 19223-19230 ◽  
Author(s):  
Jiaqi Long ◽  
Yuzhen Wang ◽  
Chaoyang Ma ◽  
Xuanyi Yuan ◽  
Wenfeng Dong ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
White Leds ◽  
Color Rendering Index ◽  
Yellow Orange ◽  
Color Rendering ◽  
Excellent Color

Two series of novel phosphors of green-yellow emitting Ca8−xSrxMgGd(PO4)7:Eu2+ and yellow-orange emitting Sr8MgGd(PO4)7:Eu2+,yMn2+ were successfully synthesized by a solid-state reaction.

Brownish red emitting YAG:Ce3+,Cu+ phosphors for enhancing the color rendering index of white LEDs

2012 ◽  
Vol 523 ◽  
pp. 151-154 ◽  
Author(s):  
Cong Zhao ◽  
Dachuan Zhu ◽  
Mingxing Ma ◽  
Tao Han ◽  
Mingjing Tu
Keyword(s):  
White Leds ◽  
Color Rendering Index ◽  
Color Rendering
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