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Proceedings Paper

Progress in AlGaN UVC LEDs by improving light extraction efficiency (Conference Presentation)
Author(s): Masafumi Jo; Noritoshi Maeda; Hideki Hirayama

Paper Abstract

AlGaN UVC light-emitting diodes (LEDs) are attracting much attentions for applications of sterilization and water purification. Here, we demonstrated the improvement in LEE by employing a photonic crystal (PhC) structure in a p-GaN contact layer. FDTD Simulation showed a significant reflection of emitted light at the interface between the PhC and the active layer, which was a function of the distance between the PhC and the active layer as well as the PhC parameters. A UVC LED with a PhC structure showed an enhanced LEE by 1.9 times compared to an LED without a PhC structure.

Paper Details

Date Published: 9 March 2020
PDF
Proc. SPIE 11302, Light-Emitting Devices, Materials, and Applications XXIV, 113021C (9 March 2020); doi: 10.1117/12.2543013
Show Author Affiliations
Masafumi Jo, RIKEN (Japan)
Noritoshi Maeda, RIKEN (Japan)
Hideki Hirayama, RIKEN (Japan)


Published in SPIE Proceedings Vol. 11302:
Light-Emitting Devices, Materials, and Applications XXIV
Jong Kyu Kim; Michael R. Krames; Martin Strassburg, Editor(s)

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