TABLE I.
Measured concentrations of Sn(ii) and Sn(iv) in SnN1−δ and Sn3N4 samples, as well as predicted atomic concentration of nitrogen associated with Sn(ii) and Sn(iv) calculated from a N:Sn ratios of 3:2 and 4:3, respectively. These are compared to the XPS determined atomic concentration of nitrogen associated with Sn(ii) and Sn(iv) from peak fits of the N 1s spectra.
| Sample composition | SnN1−δ | Sn3N4 |
|---|---|---|
| Measured total Sn | 29.8 ± 0.2 | 30.3 ± 0.9 |
| Fitted peak-A Sn-ii | 13.3 ± 1.0 | 13.2 ± 1.0 |
| Fitted peak-B Sn-iv | 9.3 ± 0.4 | 12.3 ± 0.4 |
| Measured total N | 24.1 ± 0.2 | 28.5 ± 1.9 |
| Fitted peak-1 N(Sn-ii) | 9.0 ± 0.1 | 8.8 ± 0.8 |
| Fitted peak-2 N(Sn-iv) | 12.8 ± 0.1 | 14.7 ± 1.0 |
| Calculated N(Sn-ii) | 8.9 | 8.8 |
| Calculated N(Sn-iv) | 12.4 | 16.4 |