Table 2. Optical parameters of In10Se70Te15Bi5 thin films.
| Optical parameters/time in minutes | 0 | 5 | 10 | 30 | 60 |
|---|---|---|---|---|---|
| Direct bandgap (Eg) eV | 1.368 | 1.353 | 1.348 | 1.341 | 1.330 |
| Tauc parameter (B2) (×1010) cm−2 eV2 | 6.42 | 5.67 | 5.23 | 5.10 | 4.85 |
| Static linear refractive index (n) | 3.077 | 3.087 | 3.091 | 3.096 | 3.103 |
| χ (1) | 1.963 | 1.978 | 1.983 | 1.990 | 2.001 |
| χ (3) (×10−8 esu) | 1.524 | 1.543 | 1.552 | 1.562 | 1.577 |
| n 2 (×10−7 esu) | 1.866 | 1.885 | 1.892 | 1.901 | 1.915 |
| Optical electronegativity (ηopt) | 2.880 | 2.876 | 2.874 | 2.872 | 2.868 |
| High-frequency dielectric constant (εL) | 9.47 | 9.53 | 9.55 | 9.58 | 9.63 |