High color rendering index of 94 in white LEDs employing novel CaAlSiN3: Eu2+ and Lu3Al5O12: Ce3+ co-doped phosphor-in-glass

Shih, Hsing-Kun; Liu, Chun-Nien; Cheng, Wei-Chih; Cheng, Wood-Hi

doi:10.1364/oe.403410

Cited by 22 publications

(13 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dorenbos, e.g., compiled a list of the luminous characteristics (band width, absorptivity, and emitting energy) of over 300 Eu 2+ -doped substances, proving effectively that radiations can be adjusted from close UV to deep red. As a result, low dopant concentration, data on previously published Eu 2+ -doped (oxy) nitrides were also included [19], [20].…”

Section: Results and Analysismentioning

confidence: 99%

Synthesis and photoluminescence properties in white light-emitting diodes of oxynitride green phosphor Ba3Si6O12N2

Thi

2022

IJEECS

View full text Add to dashboard Cite

Utilizing boron-coated Eu2O3, highly effective Ba3Si6O12N2 green-emitting phosphors were made using a gas reduction nitridation technique under flowing NH3 gas. We found that the synthesized phosphor is a pure phase of Ba3Si6O12N2 based on X-ray diffraction patterns. By modifying an alumina boat crystallized, the Ba3Si6O12N2 green-emitting phosphors from the result were considerably better and had higher emission intensity. Under stimulation at 405 nm, the radiation spectra revealed a typical wide green radiation band attributable to the 4f65d → 4f7 electronic transfer of Eu2+ ions. Generally, the green-emitting Ba3Si6O12N2 phosphors that were created by that method with boron-coated Eu2O3 is a potential phosphor-transformed diodes which emit white illumination white light emitting diodes(pc-WLEDs') element.

show abstract

Section: Results and Analysismentioning

confidence: 99%

Synthesis and photoluminescence properties in white light-emitting diodes of oxynitride green phosphor Ba3Si6O12N2

Thi

2022

IJEECS

View full text Add to dashboard Cite

show abstract

“…3. The red YVO 4 :Eu 3+ and green YF 3 :Mn 2+ phosphors should be prepared first so that the WLED simulation process could be performed more effectively [19]. The red phosphor YVO…”

Section: Phosphor Preparationmentioning

confidence: 99%

“…This indicates that compared to the single-layer remote model, the triple-layer successfully preserves the color balance and is able to boost the color rendering index and luminous efficiency for WLED lamps. To verify this state, the computation of light scattering and incident light power is applied with the use of Mie-scattering theory and Beer's law [19,20], which is demonstrated specifically in Section 3.…”

Section: Wled Simulationmentioning

confidence: 99%

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

Anh³

et al. 2022

J. ADV. ENG. COMPUT.

View full text Add to dashboard Cite

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 color temperature (CCT). Hence, improving the color management at high CCT for remote structures is essential. This study will present the triple-layer structures using the yellow phosphor YAG:Ce3+, the red YVO4:Eu3+ and green YF3:Mn2+ phosphors to achieve that control over the color and luminous properties of WLED packages. The results of the triple-layer structure are compared with those of the conventional remote phosphor structure (single-layer). The experiments performed on these two structures with the CCT range of 5600–8500 K. The findings in the study show that the triple-layer is more benefcial to the color rendering metric, color quality scale, and also the lumen output, especially at high color temperatures such as 8500 K, compared to the conventional one. Moreover, the higher color uniformity is accomplished with the triple-layer structure as the color deviation in this structure is much smaller than in the single-layer. Thus, the triple-layer structure can be applied as a replacement to the single-layer to attain better control of the color quality and luminous ﬂux for high-CCT WLEDs.This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium provided the original work is properly cited.

show abstract

“…LED phosphor-converted (PC) white light performance and its continuous development is improving in new packages, in a combined way and within a wide range of correlated color temperature (CCT), the Duv, and color rendering metrics, such as AN-SI/IES TM-30 or CRI Ra [25,26]. Nowadays, even cool white light is available with CRIs higher than 90 as red-light conversions are being improved using, for example, co-doped phosphor-in-glass (PiG) [27].…”

Section: Lightingmentioning

confidence: 99%

Autonomous Photovoltaic LED Urban Street Lighting: Technical, Economic, and Social Viability Analysis Based on a Case Study

Orejón-Sánchez¹,

Díaz²,

Calderón³

2021

Sustainability

View full text Add to dashboard Cite

This paper analyzes the technical and economic viability and sustainability of urban street lighting installation projects using equipment powered by photovoltaic (PV) energy. First, a description of the state-of-the-art of the technology is performed, studying the components involved in solar LED luminaires for street lighting application and examples of autonomous PV systems installed in different countries. Later, a case study a based on a renovation project of the street lighting installation at a 5000-inhabitant municipality in Lanzarote (Spain) is presented. Two alternatives are analyzed: underground channeling of the previous aerial electrical grid and the installation of LED luminaires, and, on the other hand, the installation of autonomous LED solar luminaires. Simulations concluded that a PV lighting installation proposal guarantees the existing M3 lighting requirements (EN 13201-2:2015) and represents a saving in the material execution budget of 43.78% with respect to the channeled power grid option. Finally, a statistical study has been carried out to assess the social acceptance of Spanish citizens of this autonomous PV technology in urban environments. This considers strengths and weakness of the technology: sustainability, robustness, visual impact, or risk of vandalism. In general, most subjects of all age segments are aware of the problem that means having aerial wiring running at facades (95%) and considers the use of PV in urban lighting sustainable (88%). However, 47% of those surveyed consider that shutdowns due to lack of energy harvesting is problematic and 17% consider this very problematic. This major drawback (visual impact of PV equipment is mostly evaluated as neutral) gives rise to social reluctance, especially in people younger than 50 who remarked this as more problematic than senior segments. Thus, guaranteed operational service is fundamental to have social agreement for PV technology implementation.

show abstract

High color rendering index of 94 in white LEDs employing novel CaAlSiN₃: Eu²⁺ and Lu₃Al₅O₁₂: Ce³⁺ co-doped phosphor-in-glass

Cited by 22 publications

References 13 publications

Synthesis and photoluminescence properties in white light-emitting diodes of oxynitride green phosphor Ba3Si6O12N2

Synthesis and photoluminescence properties in white light-emitting diodes of oxynitride green phosphor Ba3Si6O12N2

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

Autonomous Photovoltaic LED Urban Street Lighting: Technical, Economic, and Social Viability Analysis Based on a Case Study

Contact Info

Product

Resources

About