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Phys Rev Lett. 2008 Mar 28;100(12):126601. Epub 2008 Mar 27.

Polaron motional narrowing of electron spin resonance in organic field-effect transistors.

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  • 1Correlated Electron Research Center , AIST, Tsukuba 305-8562, Japan.

Abstract

Polaron states in organic thin-film transistors (TFTs) were investigated by the electron spin resonance (ESR) technique. Gate-field-dependent and temperature-dependent single-Lorentzian ESR spectra were observed for field-induced polarons in pentacene TFTs, demonstrating the effect of motional narrowing due to polaron diffusion. Analyses of the ESR linewidth revealed a considerably long trapping time (tau_(C) approximately 0.7 ns), the variation of which is discussed in terms of the multiple trap-and-release model.

PMID:
18517894
DOI:
10.1103/PhysRevLett.100.126601
[PubMed]
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