Table 5.
Positions of absorption bands connected with π → π* transitions of imine solutions and thin films, together with exciton band widths and absorption edge parameters of thin films.
| Compound | λmax [nm]/(Emax [eV]) | W [meV] | Eg [eV] | EU [meV] | |
|---|---|---|---|---|---|
| Solution | Thin Film | ||||
| PAz-BOO-OMe | 684.5/(1.81) | 676.0/(1.83) | 4 | 1.59 | 93 |
| PAz-BOO-OOct | 556.0/(2.23) * | 604.0/(2.05) * | 46 | 1.69 * | 62 * |
| PAz-Carb-OMe | 513.0/(2.42) | 535.0/(2.32) | 30 | 1.42 | 349 |
| PAz-Carb-OOct | 446.5/(2.78) | 450.0/(2.76) | 85 | 1.77 | 233 |
λmax—position of lowest-energy distinct absorption band, W–exciton bandwidth, Eg—energy gap designated according to Tauc model, EU—Urbach energy, * values from [22].