Research Article
Novel Imidazole Substituted Bodipy-Based Organic Sensitizers in Dye-Sensitized Solar Cells
Table 2
Calculated excitation energy characteristics of BPI-T and DPI-T.
| Molecule | Wavelength (nm) | fa | Energy level (eV) | Composition (%)b,c |
| BPI-T | 690 | 0.04 | 1.80 | H→L (70%) | 481 | 0.35 | 2.58 | H–1→L (64%) | 444 | 0.58 | 2.79 | H–2→L (57%) | 377 | 0.13 | 3.28 | H–5→L (61%) | 354 | 0.24 | 3.50 | H→L + 2 (64%) | 302 | 0.12 | 4.11 | H–3→L + 1 (59%) |
| DPI-T | 735 | 0.06 | 1.69 | H→L (70%) | 481 | 0.34 | 2.58 | H–1→L (64%) | 454 | 0.75 | 2.73 | H–2→L (67%) | 388 | 0.45 | 3.19 | H→L + 2 (45%) | 301 | 0.13 | 4.11 | H–4→L + 1 (52%) |
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aThe oscillator strength of a transition. bThe composition means contribution of each transition for excitation energies. cH→HOMO; L→LUMO.
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