TELKOMNIKA Telecommunication, Computing, Electronics and Control
Effects of BaSO4 nano-particles on the enhancement of the optical performance of white LEDs
Dublin Core
Title
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Effects of BaSO4 nano-particles on the enhancement of the optical performance of white LEDs
Effects of BaSO4 nano-particles on the enhancement of the optical performance of white LEDs
Subject
BaSO4
Color uniformity
Luminous flux
Mie-scattering theory
Color uniformity
Luminous flux
Mie-scattering theory
Description
The usage of BaSO4 nanoparticles on WLEDs luminous flux and color
uniformity improvements have been analyzed and demonstrated in this
manuscript. The mixture of BaSO4 and silicone placed on the yellow phosphor
layer benefits the internal light scattering and thus enhances the angular
correlated color temperature (CCT) homogeneity. Specifically, the blue-light
intensity at large angles tend to increase and results in light intensity
discrepancy, which can be corrected with added BaSO4. In addition to this, the
BaSO4-silicone composite modifies the refractive index of the air-phosphor
layer interface to an appropriate value, and thus, the luminous efficiency
increases. The results show that the CCT deviations is reduced by 580 K, from
1000 K to 420 K, within the angle range from -700
to +700 with BaSO4 in the
phosphor structure. The increase in luminous flux is also recorded by 2.25%,
in comparison with that of the non-BaSO4 traditional structure, at the 120-mA
driving current. Hence, integrating BaSO4 nanoparticles into the remote
phosphor structure can contributes to the enhancement of both lumen output
and CCT uniformity.
uniformity improvements have been analyzed and demonstrated in this
manuscript. The mixture of BaSO4 and silicone placed on the yellow phosphor
layer benefits the internal light scattering and thus enhances the angular
correlated color temperature (CCT) homogeneity. Specifically, the blue-light
intensity at large angles tend to increase and results in light intensity
discrepancy, which can be corrected with added BaSO4. In addition to this, the
BaSO4-silicone composite modifies the refractive index of the air-phosphor
layer interface to an appropriate value, and thus, the luminous efficiency
increases. The results show that the CCT deviations is reduced by 580 K, from
1000 K to 420 K, within the angle range from -700
to +700 with BaSO4 in the
phosphor structure. The increase in luminous flux is also recorded by 2.25%,
in comparison with that of the non-BaSO4 traditional structure, at the 120-mA
driving current. Hence, integrating BaSO4 nanoparticles into the remote
phosphor structure can contributes to the enhancement of both lumen output
and CCT uniformity.
Creator
Huu Phuc Dang, Phung Ton That, Dao Huy Tuan
Source
http://journal.uad.ac.id/index.php/TELKOMNIKA
Date
Oct 23, 2020
Contributor
peri irawan
Format
pdf
Language
english
Type
text
Files
Collection
Citation
Huu Phuc Dang, Phung Ton That, Dao Huy Tuan, “TELKOMNIKA Telecommunication, Computing, Electronics and Control
Effects of BaSO4 nano-particles on the enhancement of the optical performance of white LEDs,” Repository Horizon University Indonesia, accessed November 22, 2024, https://repository.horizon.ac.id/items/show/3707.
Effects of BaSO4 nano-particles on the enhancement of the optical performance of white LEDs,” Repository Horizon University Indonesia, accessed November 22, 2024, https://repository.horizon.ac.id/items/show/3707.