Abstract
Thermal annealing in NH3-ambient was carried out to form p-type ZnO films. The properties were examined by X-ray diffraction (XRD), Hall-effect measurement, photoluminescence (PL), and secondary ion mass spectrometry (SIMS). Electron concentrations in ZnO films were in the range of 1015-1017/cm3 with thermal annealing in NH3-ambient. The activation thermal annealing process was needed at 800 {ring operator}C under N2-ambient to obtain p-type ZnO. The electrical properties of the p-type ZnO showed a hole concentration of 1.06×1016/cm3, a mobility of 15.8 cm2/V s, and a resistivity of 40.18 Ω cm. The N-doped ZnO films showed a strong photoluminescence peak at 3.306 eV at 13 K, which is closely related to neutral acceptor bound excitons of the p-type ZnO. The incorporation of nitrogen was confirmed in the SIMS spectra.
| Original language | English |
|---|---|
| Pages (from-to) | 62-67 |
| Number of pages | 6 |
| Journal | Superlattices and Microstructures |
| Volume | 42 |
| Issue number | 1-6 |
| DOIs | |
| State | Published - Jul 2007 |
Keywords
- Annealing
- NH
- p-type doping
- ZnO