Utilizing two dimensional photonic crystals to study the relation between the air duty cycle and the light extraction efficiency of InGaN-based Light-Emitting Diodes
M. Lee, C. Hsieh, V. Su, Y. You, Po-Hsun Chen, Hung-Chou Lin, Han-Bo Yang, C. Kuan
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Abstract
In this paper, we have fabricated two-dimensional (2-D) photonic crystals (PhCs) in order to obtain the high light extraction efficiency of InGaN-based Light Emitting Diodes (LEDs) and then we used front-side illuminated micro-photoluminescence (μ-PL) spectroscopy to measure the PL intensity of our InGaN-based LEDs, we also used back-side illuminated inverted microscopy to double check our PL intensity results. From the PL intensity results, not only a nearly threefold increase in the PL intensity was observed, but also that the light output intensity has the air duty cycle dependent characteristic was demonstrated.
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