Light-emitting diode based on mask- and catalyst-free grown N-polar GaN nanorods

Nanotechnology. 2011 Jul 1;22(26):265202. doi: 10.1088/0957-4484/22/26/265202. Epub 2011 May 17.

Abstract

We report on the fabrication of a light-emitting diode based on GaN nanorods containing InGaN quantum wells. The unique system consists of tilted N-polar nanorods of high crystalline quality. Photoluminescence, electroluminescence, and spatially resolved cathodoluminescence investigations consistently show quantum well emission around 2.6 eV. Scanning transmission electron microscopy and energy-dispersive x-ray spectroscopy measurements reveal a truncated shape of the quantum wells with In contents of (15 ± 5)%.