Long-Range Jump versus Stepwise Hops:  Magnetic Field Effects on the Charge-Transfer Fluorescence from Photoconductive Polymer Films

Magnetic field effects on the charge-transfer (CT) fluorescence of a 1,2,4,5-tetracyanobenzene-doped poly(N-vinylcarbazole) thin film were investigated to clarify the primary process in photoconductive organic amorphous solid. The CT fluorescence increased with increasing magnetic field until 10 mT,...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2003-04, Vol.125 (16), p.4722-4723
Main Authors: Ito, Fuyuki, Ikoma, Tadaaki, Akiyama, Kimio, Kobori, Yasuhiro, Tero-Kubota, Shozo
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic transport in condensed matter
Exact sciences and technology
Photoconduction and photovoltaic effects
Photoconduction and photovoltaic effects
photodielectric effects
Physics
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Summary:Magnetic field effects on the charge-transfer (CT) fluorescence of a 1,2,4,5-tetracyanobenzene-doped poly(N-vinylcarbazole) thin film were investigated to clarify the primary process in photoconductive organic amorphous solid. The CT fluorescence increased with increasing magnetic field until 10 mT, and then it showed the dip around 40−50 mT. The hyperfine coupling mechanism observed in the low field and the level-crossing mechanism observed around 46 mT clearly indicate that the spin-conservative stepwise hole hops take place in the films. The boundary distance determined from the simulation based on the stepwise hopping model almost agreed with the interionic separation estimated within the Onsager analysis.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja029443o