Evidence of Photocarrier Generation via the Singlet and Triplet States in a Poly(N-vinylcarbazole) Film

A significant wavelength dependence of the excitation light was observed in the magnetic field effects (MFE) on the photocarrier generation of a benzene-1,2,4,5-tetracarbonitrile-doped poly(N-vinylcarbazole) film. The excitation of the carbazole induces positive MFEs, indicating an enhancement of th...

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Bibliographic Details
Published in:Chemistry letters 2005-10, Vol.34 (10), p.1424-1425
Main Authors: Ikoma, Tadaaki, Ito, Fuyuki, Ogiwara, Toshinari, Akiyama, Kimio, Tero-Kubota, Shozo
Format: Article
Language:English
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Summary:A significant wavelength dependence of the excitation light was observed in the magnetic field effects (MFE) on the photocarrier generation of a benzene-1,2,4,5-tetracarbonitrile-doped poly(N-vinylcarbazole) film. The excitation of the carbazole induces positive MFEs, indicating an enhancement of the photoconductivity originating from the charge separation through the triplet exciton. In contrast, a singlet spin state governs the photocarrier generation in the case of the charge transfer band excitation, because negative MFEs are induced.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.2005.1424