Comparison of UV and visible emission peak positions (nm) for Cr coated ZnO samples with varying sputtering time. Full width at half maximum (FWHM) for NBE peak is shown in fourth column. All the values are shown in ‘nm’ scale.
| Sputtering time | UV peak position (nm) | Visible peak position (nm) | FWHM of UV peak (nm) |
|---|---|---|---|
| 0 s | 380.1 | 576.9 | 18.6 |
| 5 s | 380.0 | 586.1 | 13.0 |
| 10 s | 379.8 | 589.9 | 13.8 |
| 25 s | 379.8 | 590.1 | 12.8 |
| 50 s | 378.9 | 590.0 | 13.4 |
| 100 s | 378.8 | 594.2 | 13.5 |
| 200 s | 378.6 | 592.4 | 14.4 |