Abstract
In this study, a model for calculating the bidirectional scattering
properties of phosphor layer was established by considering the light absorption
and light conversion of phosphor particle simultaneously. Based on the present
model, the light extraction efficiency was calculated and validated by comparing
with the existing experimental data and models. It is demonstrated that the
present model predicts better. The transmission and reflection intensities
of blue light and yellow light were found to be the functions of phosphor
thickness. There exists a close critical phosphor thickness for reflected
blue light and transmitted yellow light. The critical phosphor thickness is
relative to the phosphor concentration.
© 2012 IEEE
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