TELKOMNIKA Telecommunication, Computing, Electronics and Control
Enhancing light sources color homogeneity in high-power phosphor-based white LED using ZnO particles
Dublin Core
Title
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Enhancing light sources color homogeneity in high-power phosphor-based white LED using ZnO particles
Enhancing light sources color homogeneity in high-power phosphor-based white LED using ZnO particles
Subject
Angular homogeneity, Luminous efficacy, Mie-scattering theory, WLEDs, ZnO
Description
Color uniformity is one of the essentials for the on-going development of
WLED. To achieve a high color uniformity index, increasing the scattering events within the phosphor layers was reported to be the most efficient method and in this article, ZnO is the chosen material to apply in this method. After analyzing the scattering properties through the scattering cross-section Csca(D, λ), scattering coefficient μsca(λ) and scattering phase function ρ(θ, λ), the which outcomes comfirm that ZnO can enhance the scattered light in the phosphor layers. Moreover, the findings from the study of ZnO concentration from 2% to 26% suggest that color uniformity also depends on the fluctuation of ZnO concentration, therefore, to control color uniformity the focus should be implied on both size and concentration of ZnO. The experimental results from this research show that the luminous flux of WLED is at the peak if the concentration of ZnO is at 6%, and when the concentration of ZnO is at 18% and has 100 nm particles size, the ΔCCT reaches the lowest level. The final choice should be based on the desired characteristic of WLEDs, however, if the WLED need to excel in both luminous flux and ΔCCT then 6% ZnO concentration with particles size from 100 nm-300 nm is the optimal choice.
WLED. To achieve a high color uniformity index, increasing the scattering events within the phosphor layers was reported to be the most efficient method and in this article, ZnO is the chosen material to apply in this method. After analyzing the scattering properties through the scattering cross-section Csca(D, λ), scattering coefficient μsca(λ) and scattering phase function ρ(θ, λ), the which outcomes comfirm that ZnO can enhance the scattered light in the phosphor layers. Moreover, the findings from the study of ZnO concentration from 2% to 26% suggest that color uniformity also depends on the fluctuation of ZnO concentration, therefore, to control color uniformity the focus should be implied on both size and concentration of ZnO. The experimental results from this research show that the luminous flux of WLED is at the peak if the concentration of ZnO is at 6%, and when the concentration of ZnO is at 18% and has 100 nm particles size, the ΔCCT reaches the lowest level. The final choice should be based on the desired characteristic of WLEDs, however, if the WLED need to excel in both luminous flux and ΔCCT then 6% ZnO concentration with particles size from 100 nm-300 nm is the optimal choice.
Creator
Anh-Minh D. Tran, Nguyen Doan Quoc Anh, Nguyen Thi Phuong Loan
Source
DOI: 10.12928/TELKOMNIKA.v18i5.14198
Publisher
Universitas Ahmad Dahlan
Date
October 2020
Contributor
Sri Wahyuni
Rights
ISSN: 1693-6930
Relation
http://journal.uad.ac.id/index.php/TELKOMNIKA
Format
PDF
Language
English
Type
Text
Coverage
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Files
Collection
Citation
Anh-Minh D. Tran, Nguyen Doan Quoc Anh, Nguyen Thi Phuong Loan, “TELKOMNIKA Telecommunication, Computing, Electronics and Control
Enhancing light sources color homogeneity in high-power phosphor-based white LED using ZnO particles,” Repository Horizon University Indonesia, accessed September 20, 2024, https://repository.horizon.ac.id/items/show/4052.
Enhancing light sources color homogeneity in high-power phosphor-based white LED using ZnO particles,” Repository Horizon University Indonesia, accessed September 20, 2024, https://repository.horizon.ac.id/items/show/4052.