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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 22 — Nov. 4, 2013
  • pp: 26642–26656

Color rendition engineering of phosphor-converted light-emitting diodes

Artūras Žukauskas, Rimantas Vaicekauskas, Pranciškus Vitta, Akvilė Zabiliūtė, Andrius Petrulis, and Michael Shur  »View Author Affiliations

Optics Express, Vol. 21, Issue 22, pp. 26642-26656 (2013)

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We present an approach to the optimization of the trichromatic spectral power distributions (SPDs) of phosphor-converted (p-c) light-emitting diodes (LEDs) in respect of each of four different color rendition properties (high color fidelity, color saturating, color dulling, and color preference). The approach is based on selecting a model family of Eu2+ phosphors and finding the optimal peak wavelengths of the phosphor bands as functions of the luminous efficacy of radiation. A blue component due to either phosphor photoluminescence or InGaN electroluminescence with the peak wavelength at about 460 nm was found to be an optimal one for the high-fidelity, color-dulling, and color-preference LEDs. The high-fidelity and color-preference LEDs need red phosphors with the peak wavelength of 610-615 nm. The high-fidelity LEDs were shown to require a true green (~530 nm) phosphor component, whereas a cyan (~510 nm) component is the prerequisite of the color-saturating and color-preference LEDs. Deep-blue (~445 nm) and deep-red (~625 nm) components are required for the color-saturating LEDs. A broad yellow band similar to that of Ce3+ emission is to be used in the color-dulling LEDs. The SPDs of practical phosphor blends for the high-fidelity, color-saturating, and color-preference p-c LEDs are demonstrated.

© 2013 Optical Society of America

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(160.5690) Materials : Rare-earth-doped materials
(230.3670) Optical devices : Light-emitting diodes
(330.1715) Vision, color, and visual optics : Color, rendering and metamerism

ToC Category:
Optical Devices

Original Manuscript: June 14, 2013
Revised Manuscript: September 28, 2013
Manuscript Accepted: October 1, 2013
Published: October 29, 2013

Virtual Issues
Vol. 9, Iss. 1 Virtual Journal for Biomedical Optics

Artūras Žukauskas, Rimantas Vaicekauskas, Pranciškus Vitta, Akvilė Zabiliūtė, Andrius Petrulis, and Michael Shur, "Color rendition engineering of phosphor-converted light-emitting diodes," Opt. Express 21, 26642-26656 (2013)

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