Nguyễn Đoàn Quốc Anh
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View article: Assessing Thermic Degradation for Yttrium–aluminum Precursive Agents Applied to YAG Phosphor Samples
Assessing Thermic Degradation for Yttrium–aluminum Precursive Agents Applied to YAG Phosphor Samples Open
Several forms of precursive agents were made via the soggy chemical approach, beginning with yttrium–europium–aluminum nitrate (YEAN) compoundaswell as disparate precipitants, comprising urea, oxalic acid, as well as ammonium carbonate. Th…
View article: Ba3GdNa(PO4)3F:Eu2+ phosphor with blue-red emission colors on white-LED properties
Ba3GdNa(PO4)3F:Eu2+ phosphor with blue-red emission colors on white-LED properties Open
The blue/red-emission phosphor Ba3GdNa(PO4)3F:Eu2+ (BGN(PO)F-Eu) is used in this work for diodes emit white illumination (wLED). The phosphor is prepared using the solid-phase reaction. The suitable concentrations of Eu2+ ion dopant is abo…
View article: Influences from SiO2 particles on optical properties of white diodes verified through computer simulation
Influences from SiO2 particles on optical properties of white diodes verified through computer simulation Open
For typical white-illumination diodes (WLEDs) based on phosphor conversion, heat consistency would be an essential element in phosphor samples, which is based on consistent discharge intensity, apex profile, as well as location as the samp…
View article: Augmenting Chroma Performance for WLED Employing Sr8ZnSc(PO4 )7:Eu2+@SiO2 as a Scattering-Enhancing Substance
Augmenting Chroma Performance for WLED Employing Sr8ZnSc(PO4 )7:Eu2+@SiO2 as a Scattering-Enhancing Substance Open
Featuring the B-Ca3(PO4)2 phosphor system, Sr8ZnSc(PO4)7:Eu2+ (SZSPOE) phosphor can be used as an alternative to YAG:Ce3+ yellow phosphor for the advancement of the white light-emitting diode (WLED). Its potentials are demonstrated in this…
View article: Obtaining higher LED’s lighting chromaticity and luminosity with SiO2 particles at different diameters
Obtaining higher LED’s lighting chromaticity and luminosity with SiO2 particles at different diameters Open
This research delves into the promising applications of silicon dioxide (SiO2) nanoparticles related to their ability to enhance the conversion efficiency for luminescent materials through modifications in scattering effects. In addition, …
View article: REVIEW THE INFLUENCE OF ALUMINUM-ZNO FILMS ON MULTI-CHIP REMOTE-PHOSPHOR WHITE LEDS’ PROPERTIES
REVIEW THE INFLUENCE OF ALUMINUM-ZNO FILMS ON MULTI-CHIP REMOTE-PHOSPHOR WHITE LEDS’ PROPERTIES Open
Zinc oxide (ZnO) exhibits stable emission across blue, green, orange, and red wavelength regions, depending upon excitation energy and preparation conditions. It is possible to tune the ZnO luminescent bandgap by introducing metal dopants …
View article: STUDY OF K2SiF6:Mn4+@SiO2 PHOSPHOR FOR WHITE LEDS WITH HIGH ANGULAR COLOR UNIFORMITY
STUDY OF K2SiF6:Mn4+@SiO2 PHOSPHOR FOR WHITE LEDS WITH HIGH ANGULAR COLOR UNIFORMITY Open
The distinctive wide-band blue illumination absorption and red strait-line discharge of the phosphor K2SiF6:Mn4+ (KMnSF) make it an attractive material for manufacturing warm white light-emitting diodes (WLED). Nevertheless, using the high…
View article: Nano scattering particle: an approach to improve quality of the commercial led
Nano scattering particle: an approach to improve quality of the commercial led Open
The light-emitting diodes (LEDs) have emerged as a sustainable illumination solution in the lighting industry. However, the commercial LEDs suffer from low chromatic rendition performance. This work proposes a feasible approach to enhance …
View article: Improved Color Uniformity In White Light-Emitting Diodes Using LiLu(MoO4)2:Sm3+ Combined SiO2 Composite
Improved Color Uniformity In White Light-Emitting Diodes Using LiLu(MoO4)2:Sm3+ Combined SiO2 Composite Open
The research herein concerns the composite of red phosphor of LiLu(MoO4)2:Sm3+ (LMOS), yellow phosphor YAG:Ce3+, SiO2 particles, and silicone gel. The LMOS phosphor is created via the sol-gel procedure and supposed to yields significant he…
View article: The effects of Ca<sub>14</sub>Mg<sub>2</sub>(SiO<sub>4</sub>)<sub>8</sub>:Eu<sup>2+</sup> phosphor on white light emission quality of LED-phosphor packages
The effects of Ca<sub>14</sub>Mg<sub>2</sub>(SiO<sub>4</sub>)<sub>8</sub>:Eu<sup>2+</sup> phosphor on white light emission quality of LED-phosphor packages Open
Ca14Mg2(SiO4)8: Eu2+ (CMS:Eu2+) green phosphor is used for creating the white-light emitting diode (W-LED) packages with conversion phosphor materials. The phosphor shows the broadband green emission that peaks at 505 nm in the blue wavele…
View article: Triple-layer remote phosphor geometry: an excellent selection to improve the optical properties of white light-emitted diodes
Triple-layer remote phosphor geometry: an excellent selection to improve the optical properties of white light-emitted diodes Open
High performance white-light-emitting diodes (WLEDs) have been the goal of recent research on phosphor-in-glass (PiG) devices. In this paper, we introduce a configuration of WLED that achieves high color rendering index (CRI), and correlat…
View article: Phosphor conversion for WLEDs: YBO<sub>3</sub>: Ce<sup>3+</sup>, Tb<sup>3+</sup> and its effects on the luminous intensity and chromatic properties of dual-layer WLED model
Phosphor conversion for WLEDs: YBO<sub>3</sub>: Ce<sup>3+</sup>, Tb<sup>3+</sup> and its effects on the luminous intensity and chromatic properties of dual-layer WLED model Open
Yttrium borate phosphor co-doping Ce 3+ , Tb 3+ ions (YBO 3 : Ce 3+ , Tb 3+ ) is fabricated using solid state reaction, and then its luminescence is investigated through the computational energy transfer process. Under excited near-UV ligh…
View article: TiO2 nanoparticles impacts over color deviation in white light-emitting diodes
TiO2 nanoparticles impacts over color deviation in white light-emitting diodes Open
The effects of injecting TiO2nanoparticles with phosphorus silicone packing on white color light-emitting diodes (WLEDs) are examined. In WLED packages, the proposed approach may increase luminance emission by 2.7%, while the coordinated c…
View article: Selection of Gd2(WO4)3:Tb3+ for inproving color deviation in white light-emitting diodes
Selection of Gd2(WO4)3:Tb3+ for inproving color deviation in white light-emitting diodes Open
This study successfully using the hydrothermal technique to synthesize Gd2(WO4)3:Tb3+ phosphors when subjected to calcination under the temperature of 900°C. Here are some aspects that were thoroughly examined: the crystal formation, photo…
View article: Utilizing the right phosphor in near-ultraviolet and blue light-emitting diode devices to generate white illumination
Utilizing the right phosphor in near-ultraviolet and blue light-emitting diode devices to generate white illumination Open
In the scenario of solid-state lighting (SSL) gradually replacing old standard techniques; the pc-LEDs (or diodes based on conversion phosphor) becomes a common method for creating white illumination, based on SSL. As of now, both of the U…
View article: Triple-layer Design of YVO4:Eu3+, YF3:Mn2+, and YAG:Ce3+: the Potential for Advancement of Remote Phosphor Structure to Get Better Chromaticity and Luminescence at High Color Temperatures
Triple-layer Design of YVO4:Eu3+, YF3:Mn2+, and YAG:Ce3+: the Potential for Advancement of Remote Phosphor Structure to Get Better Chromaticity and Luminescence at High Color Temperatures Open
The remote phosphor structure is proven to be better than other structures of conformal or in-cup phosphor in terms of luminous efciency. Nevertheless, its color rendering ability is unstable and difficult to manage at high correlated colo…
View article: Benefits of using TiO2 quantum dots in producing low-cost and high-quality white light-emitting diodes
Benefits of using TiO2 quantum dots in producing low-cost and high-quality white light-emitting diodes Open
Quantum dots (QDs) is considered as a potential material for the improvement of light-emitting diodes (LEDs). However, different from the traditional phosphor materials, they have unique scattering and absorption properties affected by the…
View article: The Use of Y3Al5O12:Ce3+ and CaTiO3:Pr3+ in a Dual-layer Remote Phosphor Configuration Improves the Optical Efficiencies of a Phosphor-in-Glass White Light-Emitting Diode
The Use of Y3Al5O12:Ce3+ and CaTiO3:Pr3+ in a Dual-layer Remote Phosphor Configuration Improves the Optical Efficiencies of a Phosphor-in-Glass White Light-Emitting Diode Open
Although distant phosphor structure is not the best choice for color fidelity of white-light-emitting diode (W-LED) sources, it benefits the luminous flux of LED more than conformal or in-cup phosphor models. After recognizing the potentia…
View article: Comparison between SEPs of CaCO<sub>3</sub> and TiO<sub>2</sub> in phosphor layer for better color uniformity and stable luminous flux of WLEDs with 7,000 K
Comparison between SEPs of CaCO<sub>3</sub> and TiO<sub>2</sub> in phosphor layer for better color uniformity and stable luminous flux of WLEDs with 7,000 K Open
CaCO 3 and TiO 2 are proposed in this study as particles for scattering enhancement (SEPs) of phosphor-converted white light-emitting diodes (pc-WLEDs). The use of these two SEPs for scattering improvement enables boosting of the color hom…
View article: Better color distribution uniformity and higher luminous intensity for LED by using a three-layered remote phosphor structure
Better color distribution uniformity and higher luminous intensity for LED by using a three-layered remote phosphor structure Open
Angular color distribution uniformity has been one of the most relevant properties in the development of white light-emitting diodes (WLEDs), since color consistency and uniformity are crucial factors in quality evaluation of a WLED. Here,…
View article: Triple-layer remote phosphor structure: A potential packaging configuration to enhance both color quality and lumen efficiency of 6,000–8,500 K WLEDs
Triple-layer remote phosphor structure: A potential packaging configuration to enhance both color quality and lumen efficiency of 6,000–8,500 K WLEDs Open
To achieve further enhancement in the lighting quality of white light-emitting diodes (WLEDs), this study proposed a packaging structure with three different phosphor layers, called triple-layer remote phosphor structure. This structure ca…
View article: APPLYING CALCIUM FLOURIDE AND SILICA PARTICLES: A SOLUTION TO IMPROVE COLOR HOMOGENEITY OF PC-WLED
APPLYING CALCIUM FLOURIDE AND SILICA PARTICLES: A SOLUTION TO IMPROVE COLOR HOMOGENEITY OF PC-WLED Open
This article focus on enhancing the lighting performance of pc-WLEDs, the new and advanced lighting solution that is receiving lots of attention. To adapt to the demand of modern lighting, the lighting performance of pc-WLEDs must be impro…
View article: Using SiO2 nano-particles for better color uniformity and lumen output in 8500 K conformal and in-cup white LEDs
Using SiO2 nano-particles for better color uniformity and lumen output in 8500 K conformal and in-cup white LEDs Open
In the effort of improving the performance of white light LEDs devices (WLEDs), the SiO2 nano particles were applied and have shown significant impact on the optical properties. Specifically, the light output of the lighting devices is enh…
View article: Green Ca2La2BO6.5:Pb2+ phosphor: an innovative solution in enhancing the color quality and luminous flux of WLEDs
Green Ca2La2BO6.5:Pb2+ phosphor: an innovative solution in enhancing the color quality and luminous flux of WLEDs Open
Light-emitting diodes devices that embedded with multiple chips (multi-chip white LEDs (MCW-LEDs)) are an advanced lighitng solution with much potential for improvement in the lighting industry. However, to further the applicacations and q…
View article: Enhancing light scattering effect of white LEDs with ZnO nanostructures
Enhancing light scattering effect of white LEDs with ZnO nanostructures Open
Pc-LEDs, the lighting method that blends blue LED light with yellow light from phosphor to discharge white radiation, is one of the most advance known for high lumen output. However, pc-LEDs has inferior due to angular CCT deviation, which…
View article: Benefits of using TiO2 Quantum Dots in producing low-cost and high-quality white LEDs
Benefits of using TiO2 Quantum Dots in producing low-cost and high-quality white LEDs Open
Quantum dots (QDs) is considered as a potential material for the improvement of light-emitting diodes (LEDs). However, different from the traditional phosphor materials, they have unique scattering and absorption properties affected by the…
View article: Enhance WLEDs Performance with Additional Phosphor Materials in Multi-Layer Remote Structure
Enhance WLEDs Performance with Additional Phosphor Materials in Multi-Layer Remote Structure Open
One of the most important factors used to evaluate lighting performances ofWLEDs is the angular color uniformity (ACU). The triple-layer remote phosphor structure is considered as a proposed mechanism for elevating the ACU of a WLED. The a…
View article: Aiming to the superior of phosphor pattern: Influence of SiO<sub>2</sub> nanoparticles on photoluminescence intensification of YAG:Ce
Aiming to the superior of phosphor pattern: Influence of SiO<sub>2</sub> nanoparticles on photoluminescence intensification of YAG:Ce Open
Yttrium aluminum garnet (YAG: RE) rare-earth-doped phosphors have great photoluminescence (PL) characteristics and are commonly used in light-emitting rectifying tubes. The RE elements used in these phosphors, however, are precious and in …
View article: The Application of Calcium Carbonate CaCO3 and Titania TiO2 for Color Homogeneity and Luminous Flux Enhancement in PC-LEDs
The Application of Calcium Carbonate CaCO3 and Titania TiO2 for Color Homogeneity and Luminous Flux Enhancement in PC-LEDs Open
This article studies the development method of pc-LED, a phosphor-converted lighting emitting diode, with scattering enhancement particles (SEPs) at 7000 K correlated color temperature. The pc-LED is an advanced lighting solution that has …
View article: The study of convex-dual-layer remote phosphor geometry in upgrading WLEDs color rendering index
The study of convex-dual-layer remote phosphor geometry in upgrading WLEDs color rendering index Open
The white-light light-emitting diode (LED) is a semiconductor light source that usually has one chip and one phosphor layer. Because of that simple structure, the color rendering index (CRI) is really poor. Therefore, structure with double…