Vertical InGaN light-emitting diode with a retained patterned sapphire layer

Y. C. Yang, Jinn Kong Sheu, Ming Lun Lee, C. H. Yen, Wei Chih Lai, Schang Jing Hon, Tsun Kai Ko

研究成果: Article同行評審

7 引文 斯高帕斯(Scopus)

摘要

We present an efficient vertical InGaN light-emitting diode (LED) in which the proposed vertical LEDs were fabricated with patterned sapphire substrates (PSS) using thinning techniques. After the thinning of sapphire substrate, selective dry etching process was performed on the remainder sapphire layer to expose the n-GaN contact layer instead of removing the sapphire substrate using the laser lift-off technique. These processes feature the LEDs with a sapphire-face-up structure and vertical conduction property. The PSS was adopted as a growth substrate to mitigate the light-guided effect, and thereby increase the light-extraction efficiency. Compared with conventional lateral GaN LEDs grown on PSS, the proposed vertical LEDs exhibit a higher light output power and less power degradation at a high driving current. This could be attributed to the fact that the vertical LEDs behave in a manner similar to flip-chip GaN/sapphire LEDs with excellent heat conduction.

原文English
頁(從 - 到)A1019-A1025
期刊Optics Express
20
發行號106
DOIs
出版狀態Published - 2012 十一月 5

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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