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Proceedings Paper

Numerical study of current spreading and light extraction in deep UV light-emitting diode
Author(s): Xinhui Chen; Yuh-Renn Wu
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Paper Abstract

The current crowding effect in AlGaN 275 nm deep UVLEDs has been investigated by using 2D drift diffusion solver and the Monte Carlo ray-tracing method. Optimized conditions for both lateral and vertical structure have been presented in this paper by changing the spacing between 2 fingers. To improve the light extraction efficiency, using graphene as the contact layer and removing the p-GaN layer have also been discussed here. Thus with the markable increasing of LEE, the external quantum efficiency can be improved to 37.8% in the textured vertical structure without p-GaN layer.

Paper Details

Date Published: 9 March 2015
PDF: 8 pages
Proc. SPIE 9383, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIX, 93830Q (9 March 2015); doi: 10.1117/12.2078752
Show Author Affiliations
Xinhui Chen, National Taiwan Univ. (Taiwan)
Yuh-Renn Wu, National Taiwan Univ. (Taiwan)


Published in SPIE Proceedings Vol. 9383:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIX
Klaus P. Streubel; Heonsu Jeon; Li-Wei Tu; Martin Strassburg, Editor(s)

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