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

Regina Mueller-Mach; Gerd O. Mueller; Peter J. Schmidt; Detlef U. Wiechert; Joerg Meyer

doi:10.1117/12.623372

14 September 2005 Nitridosilicates: a new family of phosphors for color conversion of LEDs

Regina Mueller-Mach, Gerd O. Mueller, Peter J. Schmidt, Detlef U. Wiechert, Joerg Meyer

Proceedings Volume 5941, Fifth International Conference on Solid State Lighting; 59410Z (2005) https://doi.org/10.1117/12.623372
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

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.

Citation Download Citation

Regina Mueller-Mach, Gerd O. Mueller, Peter J. Schmidt, Detlef U. Wiechert, and Joerg Meyer "Nitridosilicates: a new family of phosphors for color conversion of LEDs", Proc. SPIE 5941, Fifth International Conference on Solid State Lighting, 59410Z (14 September 2005); https://doi.org/10.1117/12.623372

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