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The Impact of Inhomogeneities in the Phosphor Distribution on the Device Performance of Phosphor-Converted High-Power White LED Light Sources

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7 Author(s)
Christian Sommer ; Inst. of Surface Technol. & Photonics, Joanneum Res. Forschungsges.mbH, Weiz, Austria ; Frank Reil ; Joachim R. Krenn ; Paul Hartmann
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We present a study by optical ray-tracing in order to determine the impact of an inhomogeneous phosphor distribution in the color conversion elements (CCE) of phosphor-conversion- based white LED light sources. It turns out that in particular the color temperature and its angular variation, but also the flux-output are highly sensitive towards phosphor distribution variations.

Published in:

Journal of Lightwave Technology  (Volume:28 ,  Issue: 22 )