High output power density from GaN-based two-dimensional nanorod light-emitting diode arrays

作者：Lee Ya Ju^*; Lin Shawn Yu; Chiu Ching Hua; Lu Tien Chang; Kuo Hao Chung; Wang Shing Chung; Chhajed Sameer; Kim Jong Kyu; Schubert E Fred

来源：Applied Physics Letters, 2009, 94(14): 141111.

DOI：10.1063/1.3119192

• gallium compounds
• III-V semiconductors
• light emitting diodes
• nanofabrication
• nanophotonics
• vapour deposition
• wide band gap semiconductors

Here we propose and realize a scheme for making a direct contact to a two-dimensional nanorod light-emitting diode (LED) array using the oblique-angle deposition approach. And, more importantly, we demonstrate highly efficient electrical carrier injection into the nanorods. As a result, we show that at a 20 mA dc current injection, the light output power density of our nanorod LED array is 3700 mW cm(-2). More general, this contact scheme will pave the ways for making direct contacts to other kinds of nanoscale optoelectronic devices.

• 出版日期2009-4-6