Significant Enhancement of Light Extraction from Light Emitting Diodes with Reverse-Tapered Microholes

概要

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The fabrication of InGaN/GaN light emitting diodes with reverse-tapered microholes (RH-LEDs) and their optical-electrical properties were demonstrated. A high light extraction efficiency was realized with the RH-LEDs owing to the diffraction of light and effective extraction of photons caused by the microholes. The estimated light extraction efficiency of the RH-LEDs was as high as 85%; this is 1.5 times higher than that of conventional LEDs having no microholes. The theoretical results were highly consistent with the experimental results.
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