scholarly journals Improving Optical Properties of White LED Fabricated by a Blue LED Chip with Yellow/Red Phosphors

2010 ◽  
Vol 157 (9) ◽  
pp. H900 ◽  
Author(s):  
C. C. Lin ◽  
Y. S. Zheng ◽  
H. Y. Chen ◽  
C. H. Ruan ◽  
G. W. Xiao ◽  
...  
Keyword(s):  
Optical Properties ◽  
White Led ◽  
Blue Led ◽  
Red Phosphors

Efficient and ultra-thermally stable Eu3+ and Sm3+ activated narrow band red/deep red emitting phosphors and their versatile applications

2021 ◽  
Author(s):  
Priyadarshini Pradhan ◽  
Savita Priya ◽  
R. Marikumar ◽  
Kasturi Singh ◽  
Sivakumar Vaidyanathan
Keyword(s):  
Optical Properties ◽  
Plant Growth ◽  
Narrow Band ◽  
White Led ◽  
Thermally Stable ◽  
Latent Fingerprint ◽  
Red Phosphors

A succession of Eu3+ activated Na2Y4(WO4)7 (NYW) red phosphors were synthesised and studied their optical properties in details for white LED, latent fingerprint and plant growth applications. The phosphors crystallised...

scholarly journals Influence of the Ce:YAG Amount on Structure and Optical Properties of Ce:YAG-PMMA Composites for White LED

2016 ◽  
Vol 230 (9) ◽  
Author(s):  
Francesco Armetta ◽  
Motshabi A. Sibeko ◽  
Adriaan S. Luyt ◽  
Delia F. Chillura Martino ◽  
Alberto Spinella ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Methyl Methacrylate ◽  
Solid State Nmr ◽  
White Led ◽  
Blue Led ◽  
Poly Methyl Methacrylate ◽  
Structure And Morphology ◽  
Melt Compounding

AbstractCe:YAG-poly(methyl methacrylate) (PMMA) composites were prepared by using a melt compounding method, adding several amounts of Ce:YAG in the range 0.1–5 wt. %. The optical properties of the obtained composites and of the composites combined with a blue LED were measured to investigate the effect of the amount of Ce:YAG on the resulting emitted light in view of possible application in white LED manufacture. An increase in Ce:YAG amount caused an increase in the emission and a shift of 15 nm, influencing the white LED performance. The structure and morphology of the composites were studied. The results show that the interaction between the two components, observed by using solid state NMR experiments, are the responsible for the observed shift.

A Study of Optical Properties of a Glass Composition of a ZnO-Bi2O3-P2O5 Glass/Phosphor Composite for a White LED

2015 ◽  
Vol 48 (6) ◽  
pp. 145-150
Author(s):  
Bong-Ki Ryu ◽  
Il-Gu Kim ◽  
Young-Seok Kim ◽  
Jong-Hwan Kim ◽  
Jae-Yeop Jung ◽  
...  
Keyword(s):  
Optical Properties ◽  
Glass Composition ◽  
White Led ◽  
Glass Phosphor

scholarly journals Enhanced luminescence properties of Ca1+xSr2−xAl2O6:Eu3+ (0 ≤ x ≤ 1) red phosphors based on composition modulation

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12981-12989
Author(s):  
Biao Shen ◽  
Jianghang Xu ◽  
Qinan Mao ◽  
Jiasong Zhong
Keyword(s):  
Optical Properties ◽  
Quantum Efficiency ◽  
Luminescence Properties ◽  
Composition Modulation ◽  
Red Phosphors ◽  
Potential Applications ◽  
Enhanced Luminescence

A series of Ca1+xSr2−xAl2O6:Eu3+ (0 ≤ x ≤ 1) red-emitting phosphors with adjustable optical properties and excellent quantum efficiency was developed for potential applications in warm WLEDs.

scholarly journals Synthesis and optical properties of red/blue-emitting Sr2MgSi2O7:Eu3+/Eu2+ phosphors for white LED

2016 ◽  
Vol 1 (2) ◽  
pp. 204-208 ◽  
Author(s):  
Tong Thi Hao Tam ◽  
Nguyen Duy Hung ◽  
Nguyen Thi Kim Lien ◽  
Nguyen Duc Trung Kien ◽  
Pham Thanh Huy
Keyword(s):  
Optical Properties ◽  
White Led

Growth and Light Properties of Fluorescent SiC for White LEDs

2012 ◽  
Vol 717-720 ◽  
pp. 87-92
Author(s):  
Mikael Syväjärvi ◽  
Rositza Yakimova ◽  
Motoaki Iwaya ◽  
Tetsuya Takeuchi ◽  
Isamu Akasaki ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
White Light ◽  
Energy Savings ◽  
Red Light ◽  
Visible Range ◽  
White Led ◽  
Light Emitting ◽  
Blue Led ◽  
White Leds ◽  
New Type

The LED technology started to developed many years ago with red light emitting diodes. To achieve the blue LED, novel growth technologies and process steps were explored, and made it possible to demonstrate efficient blue LED performance from nitrides. The efficiency was further developed and blue LEDs were commercially introduced in the 1990’s. The white LED became possible by the use of the blue LED and a phosphor that converts a part of the blue light to other colors in the visible range to combine into white light. However, even today there are limitations in the phosphor-based white LED technology, in particular for general lighting, and new solutions should be explored to speed the pace when white LEDs will be able to make substantial energy savings. In this paper we overview gallium nitride materials evolution and growth concepts for LEDs. We describe the fluorescent silicon carbide material prepared by a novel growth technology for a new type of white LED in general lighting with pure white light. This paper introduces an interesting research in fundamental growth and optical properties of light emitting silicon carbide.

Fabrication and Luminescence Properties of CaMoO4:Eu3+ Red Phosphors for White LED

2010 ◽  
Vol 663-665 ◽  
pp. 441-444
Author(s):  
Zhen Hua Liang ◽  
Yu Zhi Feng ◽  
Xiao Xia Liu ◽  
Gui Hua Peng
Keyword(s):  
Luminescent Properties ◽  
Luminescence Properties ◽  
Precipitation Method ◽  
White Led ◽  
Doping Amount ◽  
Red Phosphors ◽  
Co Precipitation ◽  
The Relationship

CaMoO4: Eu3+ red phosphors were synthesized by co-precipitation method with H3BO3 as an additive and the relationship between H3BO3 doping amount and luminescent properties were studied. The brightness increased with increasing H3BO3 amount, the brightness of the CaMoO4: Eu3+ powder with 10 mol％ H3BO3 was 3.2 times higher than that of the phosphor without H3BO3.

White LED Packaging with Layered Encapsulation of Quantum Dots and Optical Properties

2012 ◽  
Vol 564 (1) ◽  
pp. 33-41 ◽  
Author(s):  
Seong Kwon Kwak ◽  
Tae Wook Yoo ◽  
Bo-Sung Kim ◽  
Sang Mun Lee ◽  
Yun Su Lee ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
White Led
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