Interplay between multiple scattering, emission, and absorption of light in the phosphor of a white light-emitting diode
V. Y. F. Leung,
A. Lagendijk,
T. W. Tukker
et al.
Abstract:We study light transport in phosphor plates of white lightemitting diodes (LEDs). We measure the broadband diffuse transmission through phosphor plates of varying YAG:Ce 3+ density. We distinguish the spectral ranges where absorption, scattering, and re-emission dominate. Using diffusion theory, we derive the transport and absorption mean free paths from first principles. We find that both transport and absorption mean free paths are on the order of the plate thickness. This means that phosphors in commercial … Show more
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