Optimized double-sided pattern design on a patterned sapphire substrate for flip-chip GaN-based light-emitting diodes

Zhen Che; Jun Zhang; Xinyu Yu; Mengyuan Xie; Jianhui Yu; Huihui Lu; Yunhan Luo; Heyuan Guan; Zhe Chen

doi:10.1117/1.OE.54.11.115108

18 November 2015 Optimized double-sided pattern design on a patterned sapphire substrate for flip-chip GaN-based light-emitting diodes

Zhen Che, Jun Zhang, Xinyu Yu, Mengyuan Xie, Jianhui Yu, Huihui Lu, Yunhan Luo, Heyuan Guan, Zhe Chen

Author Affiliations +

Optical Engineering, Vol. 54, Issue 11, 115108 (November 2015). https://doi.org/10.1117/1.OE.54.11.115108

Abstract

This study reports on the development and testing of a cost- and time-effective means to optimize a double-sided hemispherical patterned sapphire substrate (PSS) for highly efficient flip-chip GaN-based light-emitting diodes (LEDs). A simulation is conducted to study how light extraction efficiency (LEE) changed as a function of alteration in the parameters of the unit hemisphere for LEDs that are fabricated on a hemispherical PSS. Results show that the LEE of LED flip chip could be enhanced with the optimized hemispherical PSS by over 0.508 and is ∼115.3% higher than that of flip-chip LEDs with non-PSS. This study confirms the high efficiency and excellent capability of the optimized hemispherical PSS pattern to improve LED efficacy.

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Zhen Che, Jun Zhang, Xinyu Yu, Mengyuan Xie, Jianhui Yu, Huihui Lu, Yunhan Luo, Heyuan Guan, and Zhe Chen "Optimized double-sided pattern design on a patterned sapphire substrate for flip-chip GaN-based light-emitting diodes," Optical Engineering 54(11), 115108 (18 November 2015). https://doi.org/10.1117/1.OE.54.11.115108

Published: 18 November 2015

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