TELKOMNIKA Telecommunication Computing Electronics and Control
The better distant phosphor configurations for enhancing WLED color intensity: YVO4:Eu3+ and YF3:Mn2+

TELKOMNIKA Telecommunication Computing Electronics and Control
The better distant phosphor configurations for enhancing WLED color intensity: YVO4:Eu3+ and YF3:Mn2+

Correlated color temperature
Mie-scattering theory
Phosphor structure
YF3:Mn2+
YVO4:Eu3+

The distant phosphor configuration produces more illuminating beams than the
two settings containing conformal or in-cup phosphor. When this configuration
is used, though, it is difficult to manage the color standard of light-emitting
diodes (LEDs). As a result, in past few years, numerous studies have focused
on controlling the color standard of distant phosphor configurations. Until
present, two distant phosphor configurations of single- and triple-film
phosphor configurations, have been used to improve color standards. This
research will investigate the ideal configuration among these configurations in
terms of color rendering index (CRI), color quality scale (CQS), lumen output
(LO), as well as color homogeneity for multi-chip white LEDs (WLEDs).
WLEDs, operating at five different temperatures of color between 5600 K and
8500 K, are used to perform the studies. The results reveal that the three-sheet
phosphor setting would be more desirable, with greater CRI, CQS, and lumen
efficiency (LE) indexes. Furthermore, when using a triple-layer phosphor
arrangement, color variation is reduced, resulting in a rise in color consistency.
This conclusion is possibly verified by using Mie theory to analyze
scattering properties in distant phosphor setup, making the study findings
legitimate and important data to produce more advanced WLEDs.

Ha Thanh Tung, Huu Phuc Dang

http://telkomnika.uad.ac.id

Dec 27, 2022

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