Abstract
We report the fabrication and luminescent characteristics of GaN-based visible light-emitting diode (LED) arrays on Si substrates. For the fabrication of the LEDs, high-quality GaN/ZnO coaxial nanotube heterostructures were prepared by the heteroepitaxial growth of GaN layers on position-controlled ZnO nanotube arrays grown on 1-m-thick crack-free GaN/Si substrates. The nanostructured LEDs were composed of GaN-based p-n homojunction with GaN/In 1-xGaxN multiple quantum wells (MQWs) coaxially coated on GaN/ZnO nanotube heterostructures. The fabricated micro-LEDs emitted visible green light that originated from the MQWs of individual coaxial LEDs. In addition, the origin of the light emission was investigated by measuring cathodoluminescence and electroluminescence spectra.
Original language | English |
---|---|
Article number | 5579990 |
Pages (from-to) | 966-970 |
Number of pages | 5 |
Journal | IEEE Journal on Selected Topics in Quantum Electronics |
Volume | 17 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2011 Jul |
Externally published | Yes |
Bibliographical note
Funding Information:Manuscript received June 29, 2010; revised July 23, 2010; accepted July 23, 2010. Date of publication September 20, 2010; date of current version August 5, 2011. This work was supported by the National Creative Research Initiative under Project R16–2004-004–01001-0 of the Korea Science and Engineering Foundations.
Keywords
- Light-emitting diode (LED)
- Si
- ZnO
- nanoepitaxy
- nanophotonics
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering