Characterization of dynamic distortion in LED light output for optical wireless communications

A solid-state process was used to generate the green phosphor Ca3Si2O4N2:Eu2+. The luminescence characteristics, dispersed reflection spectra, and heat quenching were investigated initially, followed by the white light emitting diodes (wLED’s) manufacture by the Eu2+ stimulated Ca3Si2O4N2 phosphor. Based on the concentration of ion Eu2+, a wide green emission range localized between 510 and 550 nm was seen in Eu2+ -doped Ca3Si2O4N2. In Ca3Si2O4N2, the best doping concentration of Eu2+ was 1 mol%. An electric multipolar interaction process conveys energy among Eu2+ ions, with a necessary conversion distance of around 30.08 Å. Blending a near-ultraviolet (n-UV) light emitting diodes (LED) which has a GaN basis (380 nm) with the blue BaMgAl10O17:Eu2+, the green Ca3Si2O4N2:Eu2+, and the red Ca3Si2O4N2:Eu2+ phosphors yielded a wLED with a 88.25 color-rendering indice Ra at 6029 K correlating color temperature. Ca3Si2O4N2:Eu2+ appears to be a promising option to apply as a converting phosphor in wLED applications.

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“…(1) the below formula [19], [20] can be used to represent the emission intensity (I) per activating concentration (x):…”

Section: Luminescence Properties and Energy Transfer In Ca3si2o4n2:eu 2+mentioning

confidence: 99%

The enhancement of the dual-layer phosphorus configuration in color uniformity and luminous flux of a light emitting diode

Dang

That

2022

IJEECS

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“…On the basis of the ηex alteration with wavelength under 35 A/cm 2 as well as ηex being the superior limit of energy performance, the energy performance in the near-UV LEDs would not receive any benefit under the wavelengths less than roughly 405 nm with the blue LEDs emission under the wavelength ranging from 440 to 450 nm, which is the common option for white illumination. Such InxGa1-xN LED activity indicates that the phosphors excitable under wavelengths less than 405 nm would barely have a practical use for white illumination with high need for performance [15], [16].…”

Section: Led Considerations For Solid State Lightingmentioning

confidence: 99%

Utilizing the right phosphor in near-ultraviolet and blue light-emitting diode devices to generate white illumination

Thi¹

2022

IJEECS

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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 UV-LEDs and the blue LEDs have been still being considered for the task of creating white illumination through phosphor excitation as it hasn’t been known which LED type is truly superior. It is common that when it comes to phosphor, people will overlook the performance in LED devices with a wavelength range of 365 nm to 470 nm. Our research demonstrates the information concerning extrinsic quantum efficacy in the InxGa1-xN LED devices with the mentioned range as well as combines the information and the effectiveness of phosphor for the task of examining the performance of near-UV and blue LEDs and creating white illumination. In addition, the research demonstrates recreations for the task of assessing the white illumination mixtures under the correlated color temperature of 3000 K and 4000 K in the two LED structures.

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“…Evaluating the constant θ from this formula allows us to establish the sort of non-radiative power transmission. The data obtained are adjusted using the Arrhenius equation [18] to explore the thermal power obstacle [19]- [21]. (2)…”

Section: Figure 1 Photograph Of Wledsmentioning

confidence: 99%

A new Ca15(PO4)2(SiO4)6:Eu2+ phosphor with green emission for use in n-UV based w-LEDs

Huu

That

2022

IJEECS

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We have produced a novel phosphor using Eu2+, which is green in color coupled to Ca15(PO4)2(SiO4)6 (abbreviated as Ca15P2Si6) by deriving it structurally from α-Ca2SiO4 with a typical solit reaction method. Additionally, the decrease of Eu2+ concentration as well as heat endurance is being studied. 330 nm is the wavelength at which the substance is stimulated. At 491nm, it attain the greatest radiation energy when filled with the ideal concentration of Eu2+, which is 0.5 mol%. The primary mechanism of concentration reduction is discovered to be the fast transfer of stimulation through exchanging coupling among stimulated Eu2+ ions. The heat activating power boundary has been determined to be 0.244 eV. Additionally, we assess the productivity of this matter by fabricating alight-emitting diodes (LED)with converted phosphor (pc-LED) and integrating a light-emitting diode (LED) with an InGaN-foundation near-ultraviolet and running it at currents between 50 mA and 300 mA. All of the efforts result in an optimal for pc-LED to be able to ecedewhite light-emitting diodes (WLED) implementations.

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Characterization of dynamic distortion in LED light output for optical wireless communications

Cited by 31 publications

References 71 publications

The enhancement of the dual-layer phosphorus configuration in color uniformity and luminous flux of a light emitting diode

The enhancement of the dual-layer phosphorus configuration in color uniformity and luminous flux of a light emitting diode

Utilizing the right phosphor in near-ultraviolet and blue light-emitting diode devices to generate white illumination

A new Ca15(PO4)2(SiO4)6:Eu2+ phosphor with green emission for use in n-UV based w-LEDs

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