Efficiency Enhancement of Bredigite‐Structure Ca14Mg2[SiO4]8:Eu2+ Phosphor via Partial Nitridation for Solid‐State Lighting Applications. Issue 2 (9th November 2012)

• Record Type: Journal Article
• Authors: Lee, Kyoung Hwa; Im, Won Bin; Ballato, J.
• Is Part Of: Journal of the American Ceramic Society. Volume 96:Issue 2(2013)
• Page Start: 503
• Page End: 508
• Publication Date: 2012-11-09
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.12057
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace12057-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>We have synthesized a partially nitridated Ca_13.7Eu_0.3Mg₂Si₈O₃₂ (CMSN:Eu²⁺) using Si₃N₄ with a conventional solid‐state reaction and successfully determined the structural parameters by a combined Rietveld refinement method. The partial nitridation of Ca_13.7Eu_0.3Mg₂Si₈O₃₂ (CMS:Eu²⁺) led to a large enhancement in the luminescence intensity, as much as 148%. From the Rietveld refinement results, the anisotropic changes of the lattice parameters were observed for the partially nitridated samples. By incorporating this phosphor + red phosphor with an encapsulant on an InGaN light‐emitting diode (LED) (λ_max = 395 nm), white light with a color rendering index of 92 and a color temperature of 5320 K under 20 mA was obtained.</p> </abstract>