Journal of Light & Visual Environment
Online ISSN : 1349-8398
Print ISSN : 0387-8805
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High Efficiency Nitride Based Phosphors for White LEDs
Y.Q. LIH.T. HINTZEN
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Volume 32 (2008) Issue 2 Pages 129-134

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Abstract

In this overview paper, novel rare-earth doped silicon nitride based phosphors for white LEDs applications have been demonstrated. The luminescence properties of orange-red-emitting phosphors (M2Si5N8:Eu2+) and green-to-yellow emitting phosphors (MSi2N2O2:Eu2+, M = Ca, Sr, Ba) are discussed in detail with a focus on the relationship between the properties and structures. With high conversion efficiency in the near UV/blue region, along with high chemical/physical stability, Eu2+ - and Ce3+ - activated alkaline-earth silicon nitride and oxynitride materials are excellent wavelength-conversion phosphors for white LEDs.

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© 2008 The Illuminating Engineering Institute of Japan
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