TELKOMNIKA Telecommunication, Computing, Electronics and Control
Integrating SiO2 nanoparticles to achieve color uniformity and luminous efficiency enhancement for white light emitting diodes

TELKOMNIKA Telecommunication, Computing, Electronics and Control
Integrating SiO2 nanoparticles to achieve color uniformity and luminous efficiency enhancement for white light emitting diodes

Color uniformity
Luminous flux
Mie-scattering theory
SiO2

A phosphor structure with SiO2 nanoparticles is proposed to achieve the
enhancement in the correlated color temperature (CCT) homogeneity and the
luminescence performance for white light-emitting diodes (WLEDs). As
SiO2 is integrated into the phosphorus compound, the scattering effect of this
material contributes to better blue-light utilization. Thus, this innovative
packaging design results in a significant increased lumen efficiency, more
than 12%, in comparison with that of conventional dispensing ones.
Meanwhile, the angular CCT deviation also decreases considerably, from
522 K to 7 K, between the angles of -70 and 700. Moreover, this reduction
leads to the diminishment of yellow ring phenomenon effect. In addition, the
measurement of haze demonstrates that there is a strong scattering in the
visible spectrum when SiO2 is added into the silicone film. Besides that,
when increasing the driving current, SiO2 stabilizes the chromaticity
coordinate shift, which is a vital requirement for indoor lighting applications.
Furthermore, SiO2 nanoparticles own excellent optical features, cost
efficiency, and simple production will probably turn this material into a
potential material in advancing the optical performance of WLEDs.

Phan Xuan Le, Phung Ton That

http://journal.uad.ac.id/index.php/TELKOMNIKA

Aug 31, 2021

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