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All Journal International Journal of Advances in Applied Sciences Science and Technology Indonesia Indonesian Journal of Material Research
Lee, Hsiao-Yi
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics

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Journal : Science and Technology Indonesia

 1 
Large SiO₂ Sizes Influencing Light Scattering Properties in Original White LED Structure Cong, Pham Hong; Loan, Nguyen Thi Phuong; Lee, Hsiao-Yi
Science and Technology Indonesia Vol. 11 No. 2 (2026): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2026.11.2.596-608

Abstract

Previously, SiO₂ particles (1-10 wt%, <10 µm) were proposed to augment the light flux and correlated color temperature (CCT) deviation in conventional blue-excited LEDs. This research paper explores the application of larger SiO₂ particle sizes within a conventional LED model. SiO₂ particles with diameters ranging from 1 µm to 20 µm were analyzed for their scattering properties using the Stöber method, a Mie-scattering-based MATLAB program, and LightTools software to simulate the optical attributes of a phosphor-transmuted WLED apparatus, supported by XRD, SEM, and other analytical techniques. SiO₂ was integrated into the yellow phosphor YAG:Ce layer to induce scattering phenomena within the active layer. Through our investigation, the concentrations of SiO₂ and YAG:Ce phosphor were consistently maintained at 5 wt% and 10 wt%, respectively. Our findings focus on assessing backward scattering with larger SiO₂ sizes. Modulating the sizes of SiO₂ spheres reduced CCT deviation and enhanced both flux output and color rendering performance. These results emphasize the potential utility of larger SiO₂ particles in enhancing white LED performance and facilitate further investigation to optimize their usability in production processes.
Co-Authors Aditya Sripathi Bharadwaj Anh, Nguyen Doan Quoc Cong, Pham Hong Gaurav Kumar Bharti Le, Phan Xuan Loan, Nguyen Thi Phuong Nguyen Thi Phuong Loan Trang, Le Thi