Table 1. Results summary for the composition and optical band gap energies of hydrazine processed Sb2(S1-xSex)3 films.
| Target composition Sb2(S1-xSex)3 | Precursor composition (Sb/S/Se atom ratio %) | Composition measured by EDSa (Sb/S/Se atom ratio %) | Alloy film stoichiometry | Eg (eV)b |
|---|---|---|---|---|
| Sb2S3 | 25:75:0 (2:6:0) | 39.14:60.86:0 | Sb1.96S3.04 (x = 0) | 1.62 |
| Sb2(S0.95Se0.05)3 | 24.1:72.29:3.61 (2:6:0.31) | 38.24:53.11:8.65 | Sb1.91S2.66Se0.43(x = 0.14) | 1.53 |
| Sb2(S0.83Se0.17)3 | 21.74:65.22:13.02 (2:6:1.2) | 39.65:40.43:19.92 | Sb1.98S2.02Se1(x = 0.33) | 1.42 |
| Sb2(S0.73Se0.27)3 | 19.51:58.54:21.95 (2:6:2.25) | 42.21:28.32:29.47 | Sb2.12S1.42Se1.46(x = 0.51) | 1.31 |
| Sb2(S0.62Se0.38)3 | 17.24:51.72:31.04 (2:6:3.6) | 42.28:17.32:40.39 | Sb2.12S0.86Se2.02(x = 0.70) | 1.21 |
| Sb2(S0.50Se0.50)3 | 25:37.5:37.5 (2:3:3) | 38.34:9.48:52.18 | Sb1.92S0.47Se2.61(x = 0.85) | 1.20 |
| Sb2(S0.33Se0.67)3 | 25:25:50 (2:2:4) | 39.1:2.52:58.38 | Sb1.96S0.13Se2.91(x = 0.96) | 1.11 |
| Sb2(S0.17Se0.83)3 | 25:12.5:62.5 (2:1:5) | 41.24:0.59:58.17 | Sb2.01S0.03Se2.96(x = 0.99) | 1.12 |
| Sb2Se3 (x = 1) | 25:0:75 (2:0:6) | 39.20:0:60.80 | Sb1.96Se3.044(x = 1) | 1.08 |
aEDS measurements have an error which represents the uncertainty of the instrument measurements.
bOptical band gap energies (Eg) were determined from UV-vis-NIR spectra.