A boosted enhancement of light extraction from GaN-based light-emitting diodes (LEDs) with a 3-dimensional nanocone-shaped platform

• Published in: Journal of the Korean Physical Society Vol. 62; no. 1; pp. 1 - 5
• Main Author: Cho, Yo-Han
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Physical Society 2013; 한국물리학회
• Subjects: Letters; Mathematical and Computational Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Theoretical; 물리학; Nanocone-shaped pattern; Nanoimprint lithography; Anodic aluminum oxide (AAO); Light-emitting diodes (LEDs); Light extraction
• ISSN: 0374-4884; 1976-8524
• DOI: 10.3938/jkps.62.1

We report on dramatically enhanced light extraction from GaN-based light-emitting diodes (LEDs) with a 3-dimensional nanocone-shaped platform on a p -GaN surface. The nanocone-shaped platform LEDs were fabricated by using nanoimprint lithography (NIL) with a flexible nanostamp replicated from a well-ordered anodic alumina template. These soft lithographic approaches make it possible to pattern efficiently over a large area with a high-resolution. When we compared our LEDs with a nanocone-shaped platform to other conventional planar LEDs, unexpectedly, we observed boosted light extraction from the LEDs with a nanocone-shaped platform. That is mainly ascribed to the engraved nanocone-shaped patterns on the p -GaN surface, which provided a more favorable environment for photon extraction.