Abstract
X-ray diffraction (XRD), attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) and photoluminescence (PL) were applied to study yellow and red luminescence properties of as-grown and Mg-implanted n-type wurtzite GaN films grown on sapphire substrates by metal-organic chemical vapor deposition. The influence of different Mg-implanted fluences on yellow and red luminescence was studied. The as-grown GaN thin films exhibited intense broad yellow emission which reduces drastically after Mg ion implantation. A red luminescence band at approximately 750 nm appears when the Mg implantation fluence is low (1013 cm-2) whereas a yellow luminescence band suddenly increases at a Mg-implanted fluence of 1016 cm-2. The possible reasons of these phenomena are discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 41-46 |
| Number of pages | 6 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms |
| Volume | 264 |
| Issue number | 1 |
| DOIs | |
| State | Published - Nov 2007 |
| Externally published | Yes |
Keywords
- Gallium nitride (GaN)
- Infrared spectra
- Ion implantation
- Photoluminescence spectra