Solid-state absorption spectroscopy of alkyl-substituted oligothiophenes
| Autor: | Katsunori Waragai, Shu Hotta |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
chemistry.chemical_classification
Range (particle radiation) Absorption spectroscopy Chemistry Doping technology industry and agriculture General Engineering Analytical chemistry Photon energy Molecular electronic transition Condensed Matter::Materials Science Condensed Matter::Superconductivity lipids (amino acids peptides and proteins) Physical and Theoretical Chemistry Thin film Absorption (electromagnetic radiation) Alkyl |
| Zdroj: | The Journal of Physical Chemistry. 97:7427-7434 |
| ISSN: | 1541-5740 0022-3654 |
| DOI: | 10.1021/j100131a008 |
| Popis: | We have investigated the absorption spectra of thin solid films of alkyl-substituted oligothiophenes in both the neutral and doped states over a photon energy range of 0.05-5.0 eV. In the neutral state these oligomers display the π-π * transition bands in the near-UV to visible region with fine structures on the low-energy side. We found two different oxidized states for the doped species; the lower state is characterized by two subgap bands in the near-IR region that are induced upon doping and the higher state by only one band. In the two oxidized species, the π-π * band exhibits increasing intensity on the lower energy side at increasing doping levels and, finally, the absorption maximum is shifted to a low-energy region at the highest doping levels |
| Databáze: | OpenAIRE |
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