Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Current Optics and Photonics
  • Vol. 1,
  • Issue 2,
  • pp. 118-124
  • (2017)

Effect of Red-emitting Sr2.41F2.59B20.03O74.8:Eu0.12,Sm0.048 Phosphor on Color Rendering Index and Luminous Efficacy of White LEDs

Open Access Open Access

Abstract

Color rendering index (CRI) and luminous efficacy (LE) are two key performance factors of white LEDs (WLED). While most recent works in optics focus on methodology to improve these factors, little attention has been dedicated to chemical composition of materials. This paper studies the effect of Sr2.41F2.59B20.03O74.8:Eu0.12,Sm0.048 phosphor (SrSm), in terms of concentration and particle size on CRI and LE of 8500 K - WLEDs. Importantly, the molar mass of the componential ions in SrSm are calculated to shed light on the connection between the chemical composition of the material of interest and the performance of WLEDs. Results show that CRI can be improved to a value of around 86 by boosting red-light components in WLEDs, for all 3 major configurations: conformal, in-cup, and remote phosphor. CRI value tends to decrease with larger size of particles, while LE value goes in the reverse direction. On the other hand, both CRI and LE appear to be reduced at higher concentration of SrSm. This light attenuation is analyzed by using the Lambert-Beer law and Mie-scattering theory.

© 2017 Optical Society of Korea

PDF Article
More Like This
Structural modulation designed a thermally robust blue-cyan emitting phosphor Y2Mg0.8Sr0.2 Al4SiO12:Eu2+ for the high color rendering index white LEDs

Huifang Yang, Panlai Li, Zejun Ye, Xiaoxue Huo, Qian Wu, Yu Wang, and Zhijun Wang
Opt. Lett. 46(22) 5639-5642 (2021)

Emission color variation of (Ba,Sr)3BP3O12:Eu2+ phosphors for white light LEDs

Te-Wen Kuo, Wei-Ren Liu, and Teng-Ming Chen
Opt. Express 18(3) 1888-1897 (2010)

Cited By

Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.


Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved