Spin dynamics of carrier generation in a photoconductive C60-doped poly(N-vinylcarbazole) film
| Autor: | Tadaaki Ikoma, Shozo Tero-Kubota, Kimio Akiyama, Toshinari Ogiwara |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Fullerene
Chemistry Carbazole General Physics and Astronomy Chromophore law.invention Condensed Matter::Materials Science chemistry.chemical_compound law Excited state Physics::Atomic and Molecular Clusters Physical and Theoretical Chemistry Triplet state Atomic physics Spin (physics) Electron paramagnetic resonance Hyperfine structure |
| Zdroj: | Chemical Physics Letters. 411:378-383 |
| ISSN: | 0009-2614 |
| DOI: | 10.1016/j.cplett.2005.06.066 |
| Popis: | The magnetic field effects on the carrier yield have been studied to clarify the spin dynamic process during photoinduced carrier generation in a fullerene (C60)-doped poly(N-vinylcarbazole) (PVCz) film. The charge transfer (CT) complex of C60 and the carbazole (Cz) chromophore is selectively excited. The total number of carriers that escaped from the geminate pairs decreases in the presence of magnetic fields, which arises from a hyperfine mechanism of the distant ion pairs involving C60- and Cz+. Time-resolved EPR measurements verify that the excited triplet state of C60 is produced via its excited singlet state generated from the contact ion pair. The competitive formation processes of distant ion pairs and the excited states of C60 from the contact ion pair are discussed. |
| Databáze: | OpenAIRE |
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