Improving the optical efficiency of white light-emitting diodes based on phosphor-in-glass by a dual-layer remote phosphorus structure with the application of LiLaO&lt;sub&gt;2&lt;/sub&gt;:Eu&lt;sup&gt;3+&lt;/sup&gt; and CaSO&lt;sub&gt;4&lt;/sub&gt;:Ce&lt;sup&gt;3+&lt;/sup&gt;, Mn&lt;sup&gt;2+&lt;/sup&gt;

Phan Xuan Le; Le Tien

Publication:

Improving the optical efficiency of white light-emitting diodes based on phosphor-in-glass by a dual-layer remote phosphorus structure with the application of LiLaO2:Eu3+ and CaSO4:Ce3+, Mn2+

datacite.subject.fos	oecd::Engineering and technology
dc.contributor.author	Phan Xuan Le
dc.contributor.author	Le Tien
dc.date.accessioned	2022-11-02T01:45:47Z
dc.date.available	2022-11-02T01:45:47Z
dc.date.issued	2021
dc.description.abstract	While the remote phosphor structure is not an appropriate solution for WLED color uniformity, it is more advantageous for the luminous output of WLED than the conformal phosphor or in-cup phosphor structure. Acknowledging the ability of the remote phosphor structure, many studies have been carried out to surmount the color quality disadvantage of this structure. A dual-layer remote phosphor configuration is proposed in this research paper to acquire better color quality for WLEDs through heightening the color rendering index (CRI) and the color quality scale (CQS). The color temperature of the WLED packages this study is 8500 K. By inserting a layer of green CaSO4:Ce3+,Mn2+ or red LiLaO2:Eu3+ phosphor on the yellow YAG:Ce3+ phosphor layer, the phosphor structure configuration can be constructed. Then, to get the best color quality, the concentration of added phosphor LiLaO2:Eu3+ would be changed. The findings showed the rise of CRI and CQS along with the LiLaO2:Eu3+, which implies the influence of LiLaO2:Eu3+ to the growth of red light components within WLEDs packages. The greater the concentration of LiLaO2:Eu3+ is, the more the CRI and CQS increase. Meanwhile, the luminous flux gains from the green phosphor CaSO4:Ce3+,Mn2+. Nevertheless, the luminous flux and color quality would decrease if the concentrations of both red LiLaO2:Eu3+ and green CaSO4:Ce3+,Mn2+ phosphors reach a certain corresponding level. Centered on the Mie-scattering theory and the law of Lambert-Beer, this result is illustrated. The findings in this research are vital references for manufacturing WLEDs with higher white light performance.
dc.identifier.doi	10.11591/eei.v10i4.2904
dc.identifier.uri	http://repository.vlu.edu.vn:443/handle/123456789/597
dc.language.iso	en_US
dc.relation.ispartof	Bulletin of Electrical Engineering and Informatics
dc.relation.issn	2302-9285
dc.relation.issn	2089-3191
dc.subject	"CaSO4:Ce3+
dc.subject	Mn2+
dc.subject	Color quality
dc.subject	LiLaO2:Eu3+
dc.subject	Lumen output
dc.subject	Mie-scattering theory
dc.subject	WLEDs"
dc.title	Improving the optical efficiency of white light-emitting diodes based on phosphor-in-glass by a dual-layer remote phosphorus structure with the application of LiLaO<sub>2</sub>:Eu<sup>3+</sup> and CaSO<sub>4</sub>:Ce<sup>3+</sup>, Mn<sup>2+</sup>
dc.type	journal-article
dspace.entity.type	Publication
oaire.citation.issue	4
oaire.citation.volume	10