Light extraction efficiency enhancement using surface-structured light-emitting diodes with a subwavelength coating

Myung Su Seok; SeokJae J. Yoo; Jong Ho Choe; Q Han Park; Yong Tae Moon

doi:10.3938/jkps.68.462

Light extraction efficiency enhancement using surface-structured light-emitting diodes with a subwavelength coating

Myung Su Seok, SeokJae J. Yoo, Jong Ho Choe, Q Han Park, Yong Tae Moon

Department of Physics

Research output: Contribution to journal › Article

2 Citations (Scopus)

Abstract

The results of our analysis, which was done by using the finite-difference, time-domain (FDTD) methods suggest that surface-structured light-emitting diodes (LEDs) with a subwavelength aluminum-nitride coating will have an enhanced light extraction efficiency. The use of such a LED structure will reduce both the internal reflection and the impedance mismatch, leading to a 3.2-fold enhancement in the light extraction efficiency compared to that for bare planar LEDs. We also present an improved method of modeling the light emission from the LED’s active layers to numerically calculate the light extraction efficiency of LEDs.

Original language	English
Pages (from-to)	462-466
Number of pages	5
Journal	Journal of the Korean Physical Society
Volume	68
Issue number	3
DOIs	https://doi.org/10.3938/jkps.68.462
Publication status	Published - 2016 Feb 1

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Keywords

Anti-reflection coatings
Light-emitting diodes
Total internal reflection

ASJC Scopus subject areas

Physics and Astronomy(all)

Cite this

Seok, M. S., Yoo, S. J., Choe, J. H., Park, Q. H., & Moon, Y. T. (2016). Light extraction efficiency enhancement using surface-structured light-emitting diodes with a subwavelength coating. Journal of the Korean Physical Society, 68(3), 462-466. https://doi.org/10.3938/jkps.68.462

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AB - The results of our analysis, which was done by using the finite-difference, time-domain (FDTD) methods suggest that surface-structured light-emitting diodes (LEDs) with a subwavelength aluminum-nitride coating will have an enhanced light extraction efficiency. The use of such a LED structure will reduce both the internal reflection and the impedance mismatch, leading to a 3.2-fold enhancement in the light extraction efficiency compared to that for bare planar LEDs. We also present an improved method of modeling the light emission from the LED’s active layers to numerically calculate the light extraction efficiency of LEDs.

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10.3938/jkps.68.462