We show that research presented in Opt. Lett. 34, 301 (2009) applied questionable phosphor definitions and a questionable simulation procedure for light-emitting diodes. Our simulation indicates that a one-dimensional photonic crystal is beneficial for color control but cannot improve the light extraction as asserted in that Letter.

© 2010 Optical Society of America

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  1. L. Wang, P.-F. Gu, and S.-Z Jin, Opt. Lett. 34, 301 (2009).
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Figures (1)

Fig. 1
Fig. 1

Effects of PhC on light propagation.

Tables (2)

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Table 1 Definitions of LED Model

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Table 2 Results for LEDs with and without PhC