Tunable white light emission of a large area film-forming macromolecular complex with a high color rendering index

Zhang, Aiqin; Wang, Bin; Qian, Yan; Wang, Yongchao; Jia, Jing; Jia, Husheng; Xu, Bingshe; Wong, Wai Yeung

doi:10.1364/ome.8.003635

Cited by 15 publications

(14 citation statements)

References 39 publications

(32 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 2017, Nhan and his partners reported that structure with red phosphor SrO.3B2O3:Sm 2+ in the dual remote phosphor can enhance light output by 17% in comparison to the conventional phosphor configuration. Besides, in the stable concentration of red phosphor SrO.3B2O3:Sm 2+ , the structure can achieve 5% higher color rendering index (CRI) than the mixed phosphor WLEDs [22,23]. However, this study just showed the better results of CRI which is one of elements using to evaluate the color quality.…”

Section: Introductionmentioning

confidence: 70%

Enhance the chromatic uniformity and luminous efficiency of WLEDs with triple-layer remote phosphor structures

Loan

2020

IJECE

View full text Add to dashboard Cite

The angular color uniformity (ACU) with the ability to evaluate chromatic performance of WLED has become an important target to achieve in producing higher-quality WLEDs. This paper studies the ACU enhancing effects of novel triple-phosphor configuration in lighting devices with remote phosphor structure. Moreover, the optical influences of remote phosphor structure with three phosphor layers (TL) on WLEDs properties are calculated and compared to the dual-layer (DL) one for reference. The experiments are applied to devices at 5 distinct correlated color temperature ranging from 5600-8500 K. The results presented that DL structure attains better color rendering index (CRI) than the TL one. Meanwhile, in terms of color quality scales (CQS), TL model shows higher values at all ACCTs, compared to the DL. Moreover, the luminous flux of DL configuration is lower than that of TL structure. In addition, the diversion of color temperature depicts as D-CCT in TL structure is much better than the value in DL structure, especially at high ACCT as 8500 K, which means TL is good for chromatic uniformity of high ACCTs WLEDs. These results proved that the triple-layer structure is superior and more effective to apply for acquiring the enhancement of WLEDs package.

show abstract

Section: Introductionmentioning

confidence: 70%

Enhance the chromatic uniformity and luminous efficiency of WLEDs with triple-layer remote phosphor structures

Loan

2020

IJECE

View full text Add to dashboard Cite

show abstract

“…In order to confirm the optical properties of phosphor compounding, the scattering coefficient μsca are calculated based on the Mie theory [25]. The following expressions demonstrate the connection among the three elements: the scattering coefficient (SC), the wavelength, and the size of MgCeAl11O19:Tb 3+ particles.…”

Section: Computation and Discussionmentioning

confidence: 99%

The effectiveness of MgCeAl11O19:Tb3+ phosphor in enhancing the luminous efficacy and color quality of multi-chip white LEDs

Loan

Anh

2020

IJECE

View full text Add to dashboard Cite

In this research paper, we introduced yellow-green MgCeAl11O19:Tb3+ asa new phosphor ingredient to adapt to the quality requirements onthe chromatic homogeneity and emitted luminous flux of modern multi-chip white LED lights (MCW-LEDs). The results from experiments and simulation show that employing MgCeAl11O19:Tb3+ phosphor can lead to much better optical properties and therefore is a perfect supporting material to achieve the goals of the research. When the MgCeAl11O19:Tb3+ phosphor is added into the phosphorus composite which already contains YAG: Ce3+ particles, and the silicone glue, it affects the optical properties significantly. In other words, the concentration of this phosphor can determine the efficiency of lumen output and chromatic homogeneity of WLEDs. In specific, as the concentration of MgCeAl11O19:Tb3+ go up, the luminous yield will increase accordingly, though there is an insignificant decrease in CQS. Moreover, if the MgCeAl11O19:Tb3+ concentration reduce a little bit, it is possible to better the correlated color temperature uniformity and lumen efficacy of LED packages. In addition, the Mie scattering theory, Monte Carlo simulation and LightTools 8.3.2 software are employed to analyze and simulate the LED packages’ structure as well as the phosphor compound.

show abstract

“…HfO 2 /SiO 2 DBR film, on the other hand, can lower the color deviation from 1758 K to 280 K at 5000 K CCT [7]. Finally, the micro-patterned is also effective by deducting about 441 K color deviation value at 5337 K CCT [8]. The effects of these mentioned methods in boosting spatial color homogeneity are profound and have been tested, however, the complexity in fabrication as well as the high manufacturing cost prevent them from being widely used.…”

Section: Introductionmentioning

confidence: 97%

The Application of Calcium Carbonate CaCO3 and Titania TiO2 for Color Homogeneity and Luminous Flux Enhancement in PC-LEDs

Pham

Phan

Luo³

et al. 2021

J. ADV. ENG. COMPUT.

View full text Add to dashboard Cite

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 been applied in many different categories; nonetheless, to keep up with the demands of modern lighting, the pc-LEDs need to enhance the color homogeneity and luminous flux. The detailed experiments on the two SEPs used in the articles are also presented. The experiments include combining each of these SEPs with a yellow phosphor Y3Al5O12:Ce3+ to test their properties and influences on the lighting of pc-LEDs. The scattering coefficients, the anisotropic scattering, the reduced scattering, and the scattering amplitudes at 450 nm and 550 nm are the subjects of SEPs study. The LightTools program is used to create the simulation of pc-LED, the results of the optical simulation will then be verified with the Mie-scattering theory. The findings of the research conclude that TiO2 particles are the best for the growth of color homogeneity while CaCO3 particles are effective in limiting the color deviation in correlated color temperature. Even though the SEPs benefit the lighting performance, their concentration must be managed to be under an acceptable amount to ensure desired results and avoid unwanted damages.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

Tunable white light emission of a large area film-forming macromolecular complex with a high color rendering index

Cited by 15 publications

References 39 publications

Enhance the chromatic uniformity and luminous efficiency of WLEDs with triple-layer remote phosphor structures

Enhance the chromatic uniformity and luminous efficiency of WLEDs with triple-layer remote phosphor structures

The effectiveness of MgCeAl11O19:Tb3+ phosphor in enhancing the luminous efficacy and color quality of multi-chip white LEDs

The Application of Calcium Carbonate CaCO3 and Titania TiO2 for Color Homogeneity and Luminous Flux Enhancement in PC-LEDs

Contact Info

Product

Resources

About