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Nitridosilicates: a new family of phosphors for color conversion of LEDs
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Paper Abstract

Phosphor-converted Light Emitting Diodes (pc-LEDs) to generate white light from blue or UV emitting diodes can be made using Eu2+ doped nitridosilicates - M2Si5N8- and/or oxo nitridosilicates - MSi2O2N2 with M=alkaline earth. Luminescence properties of some out of this new class of color converters have been investigated. As expected from strong absorption the decay times of the internally excited Eu2+ is short (around 1 microsec) and depends on the cation sharing the unit cell. Time resolved spectroscopy illustrates the behavior even more clearly. Laboratory pcLEDs using 2 of the nitride phosphors show excellent drive and temperature stability of all color properties as expected.

Paper Details

Date Published: 14 September 2005
PDF: 8 pages
Proc. SPIE 5941, Fifth International Conference on Solid State Lighting, 59410Z (14 September 2005); doi: 10.1117/12.623372
Show Author Affiliations
Regina Mueller-Mach, Lumileds Lighting (United States)
Gerd O. Mueller, Lumileds Lighting (United States)
Peter J. Schmidt, Philips Research Labs. (Germany)
Detlef U. Wiechert, Philips Research Labs. (Germany)
Joerg Meyer, Philips Research Labs. (Germany)

Published in SPIE Proceedings Vol. 5941:
Fifth International Conference on Solid State Lighting
Ian T. Ferguson; John C. Carrano; Tsunemasa Taguchi; Ian E. Ashdown, Editor(s)

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