Open AccessApplying calcium fluoride and silica particles: A solution to improve color homogeneity of pc-WLEDS
Author(s) -
Huu Phuc Dang,
Nguyen Thi Phuong Loan,
Thanh Tùng Nguyễn,
Sang Ho
Publication year - 2021
Publication title -
international journal of power electronics and drive systems/international journal of electrical and computer engineering
Language(s) - English
Resource type - Journals
eISSN - 2722-2578
pISSN - 2722-256X
DOI - 10.11591/ijece.v11i5.pp3864-3869
Subject(s) - luminous efficacy , phosphor , luminous flux , scattering , homogeneity (statistics) , materials science , quantum efficiency , wavelength , optics , chemistry , analytical chemistry (journal) , physics , optoelectronics , light source , nanotechnology , computer science , layer (electronics) , machine learning , chromatography
This article focuses on enhancing the lighting efficiency of pc-WLEDs, a new and advanced lighting solution that has received lots of attention. To adapt to the demand of modern lighting, the lighting performance of pc-WLEDs must be improved, especially the color homogeneity and luminous flux, two of the most important quality indicators of pc-WLEDs. Through experiments, this article proposes using the scattering enhancement particles (SEPs) such as CaF 2 and SiO 2 with yellow phosphor Y 3 Al 5 O 12 :Ce 3+ in pc-WLEDs configuration. The pc-WLEDs model is created by using the LightTools program and set at 8500 K correlated color temperature, while the experimental results yielded from this simulation will be verified by Mie-scattering theory. The information from this article reveals the scattering coefficients of SEPs at 455 nm and 595 nm wavelengths. Moreover, it is confirmed that the employment of CaF 2 is effective in promoting the color but may damage the luminous efficiency if the concentration is too high while the SEP material, SiO 2 , exhibits high luminous efficiency at all concentration.