Warm-white-light emitting diode utilizing a single-phase full-color Ba3MgSi2O8:Eu2+, Mn2+ phosphor

2004 ◽  
Vol 84 (15) ◽  
pp. 2931-2933 ◽  
Author(s):  
J. S. Kim ◽  
P. E. Jeon ◽  
J. C. Choi ◽  
H. L. Park ◽  
S. I. Mho ◽  
...  
Keyword(s):  
White Light ◽  
Single Phase ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Full Color ◽  
Warm White Light

A Single-Phase Full-Color Ca4Si2O7F2:Ce3+, Tb3+, Sm3+ Micron Belt Mat for White-Light Emitting Diode Application

2016 ◽  
Vol 697 ◽  
pp. 727-732 ◽  
Author(s):  
Bo Cui ◽  
Qing Hong Zhang ◽  
Hong Zhi Wang ◽  
Yao Gang Li
Keyword(s):  
Heat Treatment ◽  
White Light ◽  
Single Phase ◽  
Uv Light ◽  
Light Emitting Diode ◽  
Electrospinning Process ◽  
Light Emitting ◽  
Full Color ◽  
Color Tunable ◽  
White Light Emitting Diodes

A new kind of Ca4Si2O7F2:Ce3+, Tb3+, Sm3+ oxyfluoride phosphor micron belt mat was obatained by simply electrospinning process and subsequent heat treatment. XRD result shows that a pure Ca4Si2O7F2 phase can be obtained at low temperature of around 900 °C. The micron belt precursor has a smooth surface and uniform morphology, and the width and thickness of the belt is about 2 μm and 200 nm. The morphology of micron belt is well retained after heat treatment, forming a plat phosphor mat consisting of uniform micron belt network. Ca4Si2O7F2:Ce3+, Ca4Si2O7F2:Tb3+, and Ca4Si2O7F2:Sm3+ exhibit the characteristic emissions of Ce3+ (4f7→4f65d1, blue), Tb3+ (4f8→4f75d, green), and Sm3+ (4f6→4f65d, red) under the excitation of near-UV light, respectively. By adjusting the doping concentration of Ce3+, Tb3+, Sm3+ ions a white emission in a single phase was obtained under the excitation of 360 nm. We have demonstrated that Ca4Si2O7F2:Ce3+, Tb3+, Sm3+ phosphor mat can be a promising candidate for a color-tunable phosphor mat applied in a near-UV White light emitting diodes.

White-light-emitting diode using a single-phase full-color (Ba,Sr)10(PO4)4(SiO4)2:Eu2+ phosphor

2014 ◽  
Vol 147 ◽  
pp. 250-252 ◽  
Author(s):  
YU Jingjie ◽  
Weitao GONG ◽  
Yanjie ZHANG ◽  
Guiling NING
Keyword(s):  
White Light ◽  
Single Phase ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Full Color

scholarly journals The photoluminescence of single-phase warm white-light-emitting luminescence using CaSnO3: Ce3+/ Mn4+/ Dy3+ phosphors

2021 ◽  
pp. 1-12
Author(s):  
Yan-Xun Chen ◽  
Meng-Hung Tsai ◽  
I-Wei Tseng ◽  
Hung-Chi Yen ◽  
Cheng-Liang Huang
Keyword(s):  
White Light ◽  
Single Phase ◽  
Light Emitting ◽  
Warm White Light

Tunable full-color-emitting La0.827Al11.9O19.09:Eu2+,Mn2+ phosphor for application to warm white-light-emitting diodes

2006 ◽  
Vol 89 (23) ◽  
pp. 231909 ◽  
Author(s):  
Yu-Ho Won ◽  
Ho Seong Jang ◽  
Won Bin Im ◽  
Duk Young Jeon ◽  
Jeong Soo Lee
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Full Color ◽  
Warm White Light ◽  
White Light Emitting Diodes

Eu2+-activated full color orthophosphate phosphors for warm white light-emitting diodes

RSC Advances ◽  
2014 ◽  
Vol 4 (62) ◽  
pp. 33114-33119 ◽  
Author(s):  
Chenglong Zhao ◽  
Zhiguo Xia ◽  
Molin Li
Keyword(s):  
White Light ◽  
Potential Application ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
White Leds ◽  
Full Color ◽  
Warm White Light ◽  
White Light Emitting Diodes

Eu2+-activated full-color versatile orthophosphate phosphors can find potential application in warm white LEDs.

scholarly journals Ternary complex [Sm(acac)3(5-Br-2,2′-bpy)] for the solution-processed white polymer light-emitting diode (WPLED)

2020 ◽  
Author(s):  
Jiaxiang Liu
Keyword(s):  
Solid State ◽  
White Light ◽  
Ternary Complex ◽  
Light Emitting Diode ◽  
Primary Component ◽  
Solution Processed ◽  
Light Emitting ◽  
Full Color ◽  
Polymer Light Emitting Diode ◽  
The Ideal

In consideration of the Sm3þ-centered characteristic orange-light as the ideal color-primary component toward a dichromatic white-light, herein, through the doping of the complex [Sm(acac)3(5-Br-2,20-bpy)] (2; Hacac ¼ acetylacetone; 5-Br-2,2′-bpy ¼ 5-Br-2,20-bipyridine) into the PVK (PVK ¼ poly(N-vinyl-carbazole)) host, the obtained PVK@2 film (10:1, wt/wt) exhibits the straightforward solid-state white-light (ΦPL ¼ 6.7%). Further using the PVK@2 film (10:1; wt/wt) as the emitting layer, its singlecomponent solution-processed WPLED gives the electroluminescent performance (LMax of 360.9 cd/m2, ηMax c of 1.08 cd/A) satisfactory enough for portable full-color flat displays

scholarly journals Single-component white polymer light-emitting diode (WPLED) based on a binary tris-pyrazolonate-Sm-complex

2020 ◽  
Author(s):  
Jiaxiang Liu
Keyword(s):  
White Light ◽  
Light Emitting Diode ◽  
Single Component ◽  
Color Tuning ◽  
Solution Processed ◽  
Light Emitting ◽  
Component Solution ◽  
Full Color ◽  
Polymer Light Emitting Diode

Based on the doping of the binary tris-pyrazolate-Sm3þ complex [Sm(tba-PMP)3(5-Br-2,20-bpy)] (1; 5-Br-2,2′bpy ¼ 5-bromo2,20-bipyridine and Htba-PMP ¼ 1-phenyl-3-methyl-4-(tert-butylacetyl)-5-pyrazolone)) with an efficient orange-light into the PVK (poly(N-vinylcarbazole) host, the obtained PVK@1 films exhibit the dichromatic color-tuning (white-light to purplish-pink and to pink) characters strictly relative to the Sm3þdoping content and the λex wavelength. Further using the PVK@1 film (10:1; wt/wt) with the straightforward white-light (ΦPL ¼ 5.8%) as the emitting layer, its single-component solution-processed WPLED gives the electroluminescent performance (LMax of 157 cd/m2, ηMax c of 0.65 cd/A and the white-light-emitting stability) satisfactory enough for portable full-color flat displays.

High CRI in phosphor-in-doped glass under near-ultraviolet excitation for warm white light-emitting diode

2021 ◽  
Vol 229 ◽  
pp. 117684
Author(s):  
A. Arellano-Morales ◽  
J. Molina-González ◽  
H. Desirena ◽  
J.M. Bujdud-Perez ◽  
S. Calixto
Keyword(s):  
White Light ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Ultraviolet Excitation ◽  
Near Ultraviolet ◽  
Warm White Light ◽  
Doped Glass

Eu3+/Eu2+/Tb3+ co-activated single-phase Gd2O2S: A high-performance white light emitting phosphor for light emitting diode

2021 ◽  
Vol 11 (1) ◽  
pp. 54-62
Author(s):  
Jinpeng Xie ◽  
Bonan Liu ◽  
Qingtao Qong ◽  
Zhicheng Xu ◽  
Zhiqiang Jin ◽  
...  
Keyword(s):  
White Light ◽  
High Performance ◽  
Single Phase ◽  
Light Emission ◽  
Light Emitting Diode ◽  
Energy Transfer Mechanism ◽  
Excitation Spectra ◽  
Phosphor Material ◽  
Light Emitting ◽  
Co Doped

In this work, we report Eu3+/Tb3+/Eu2+ co-activated Gd2O2 S as novel phosphor materials that can be effectively applied in the white-light emitting diode based on a near-UV chip with sensational performances. The luminescent properties and energy transfer mechanism have been thoroughly investigated. The as-prepared europium/terbium co-doped Gd2O2 S phosphors exhibit strong fluorescence with tunable color output under UV-vis light excitation. Furthermore, a high response to ultraviolet illumination of 398 nm wavelength was observed in the excitation spectra, indicating an excellent match with a light-emitting-diode chip in the dominant emissions. It is found that a tricolor (blue, green and red) emission band which results in a white light emission can be acquired when Eu3+, Eu2+ and Tb3+ ions are all co-doped into the single phase Gd2O2S, and an optimum ion doping level (10 at.% Eu and 0.7 at.% Tb) can effectively emit nearly pure white color photoluminescence with lifetime effectively tuned from 0.55 ms to 1.10 ms. The CIE (Commission International de I'Eclairage 1931 chromaticity) is X = 0.3507, Y = 0.3029. It is therefore expected that the newly found phosphor material with high-performance properties possess great potentials for the future advanced white LED applications.

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