Abstract

In this study, we fabricated a high-brightness AlGaInP light-emitting diode (LED) using the direct printing technique and dry etching. In general, wet etching is used for surface roughening to improve the light extraction of AlGaInP red LEDs. However, a structure fabricated by wet etching has limited height and shows a tiled cone shape after the etching process due to the AlGaInP crystal structure. These limitations reduce the light extraction of the LED. As a result, we fabricated a perfectly cone-shaped pattern with high aspect ratio using direct printing by etching to maximize the LED light extraction efficiency. Compared to the red LED with a wet-etched structure, the patterning enhanced the light output power by 12% without electrical degradation. This enhanced light output power was maintained even after the packaging process.

© 2013 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Wafer-scale surface roughening for enhanced light extraction of high power AlGaInP-based light-emitting diodes

Hyeong-Ho Park, Xin Zhang, Yunae Cho, Dong-Wook Kim, Joondong Kim, Keun Woo Lee, Jehyuk Choi, Hee Kwan Lee, Sang Hyun Jung, Eun Jin Her, Chang Hwan Kim, A-Young Moon, Chan-Soo Shin, Hyun-Beom Shin, Ho Kun Sung, Kyung Ho Park, Hyung-Ho Park, Hi-Jung Kim, and Ho Kwan Kang
Opt. Express 22(S3) A723-A734 (2014)

Fabrication of high-refractive-index microstructures and their applications to the efficiency improvement of GaN-based LEDs

Yeeu-Chang Lee, Chih-Yeeu Chen, and Yen-Yu Chou
Opt. Express 19(S6) A1231-A1236 (2011)

Conformally direct imprinted inorganic surface corrugation for light extraction enhancement of light emitting diodes

Sarah Kim, Sang-Mook Kim, Hyeong-Ho Park, Dae-Geun Choi, Jae-Woo Jung, Jun Ho Jeong, and Jong-Ryul Jeong
Opt. Express 20(S5) A713-A721 (2012)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription