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

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
April 2009
Applied Physics Letters;4/6/2009, Vol. 94 Issue 14, p141111
Academic Journal
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.


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