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Proceedings Paper

Broadband white emitting amorphous yttrium-aluminum-borate phosphors for high CRI w-LEDs
Author(s): Atul D. Sontakke; M. Salaün; V. F. Guimarães; A. Ferrier; L. Maia; I. Gautier-Luneau; B. Viana; A. Ibanez
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Paper Abstract

Majority of w-LEDs (white light emitting diodes) are based on InGaN blue-LED associated with phosphors exhibiting complementary color emissions to generate required white light output. However, such complementary color mixing with the lack of violet and mainly orange-red color results in poor color-rendering index (CRI). To achieve better resolution of natural white color, recent trends on w-LEDs are focused on broadband visible emitting phosphors excitable with near UV or violet LEDs. Here, we present novel amorphous yttrium-aluminum-borate (g-YAB) phosphors exhibiting broad visible emission under UV-violet excitations. These g-YAB phosphors show high internal quantum yields (~90 %) under 365 nm excitation, possess good thermal stability over 200°C and maintains the performance for continuous and repeated operations that are ideal for the development of near UV-violet excitable w-LEDs with high color rendering ability.

Paper Details

Date Published: 16 February 2017
PDF: 8 pages
Proc. SPIE 10124, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXI, 1012409 (16 February 2017); doi: 10.1117/12.2253104
Show Author Affiliations
Atul D. Sontakke, Institut de Recherche de Chimie Paris, CNRS (France)
M. Salaün, Institut NÉEL, CNRS, Univ. Grenoble Alpes (France)
V. F. Guimarães, Institut NÉEL, CNRS, Univ. Grenoble Alpes (France)
A. Ferrier, Institut de Recherche de Chimie Paris, CNRS (France)
L. Maia, Univ. Federal de Goiás (Brazil)
I. Gautier-Luneau, Institut NÉEL, CNRS, Univ. Grenoble Alpes (France)
B. Viana, Institut de Recherche de Chimie Paris, CNRS (France)
A. Ibanez, Institut NÉEL, CNRS, Univ. Grenoble Alpes (France)


Published in SPIE Proceedings Vol. 10124:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXI
Jong Kyu Kim; Michael R. Krames; Li-Wei Tu; Martin Strassburg, Editor(s)

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