White LED phosphors: the next step

Hajime Yamamoto

doi:10.1117/12.843536

25 February 2010 White LED phosphors: the next step

Hajime Yamamoto

Proceedings Volume 7598, Optical Components and Materials VII; 759808 (2010) https://doi.org/10.1117/12.843536
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

Application of white LEDs is extended toward high-output light sources, e.g. for automotive headlights, and better spectral matching with optical filters for LCD backlighting. To meet such new demands, phosphor materials have been investigated with focus on their luminescence spectra, temperature characteristics and reliability. The conventional yellow phosphor based on Y₃Al₅O₁₂:Ce³⁺ has excellent performance as a single phosphor combined with a blue LED. More recently developed nitrido- or oxonitrido-silicates activated with Eu²⁺ are also promising materials showing green to red luminescence depending on a composition and high thermal and chemical stability. And yet, demands for specific application have been made clear and strong. This paper reviews the present status and challenging goals of phosphors in the next stage further to make progress in white LEDs.

Citation Download Citation

Hajime Yamamoto "White LED phosphors: the next step", Proc. SPIE 7598, Optical Components and Materials VII, 759808 (25 February 2010); https://doi.org/10.1117/12.843536

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