The electronic structure of solid α-sexithiophene

Authors

  • Prof. Carlo Taliani,

    Corresponding author
    1. Istituto di Spettroscopia Molecolare del CNR Via P. Gobetti, 101, I-40126 Bologna (Italy)
    • Istituto di Spettroscopia Molecolare del CNR Via P. Gobetti, 101, I-40126 Bologna (Italy)
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  • Prof. Lev M. Blinov

    1. Institute of Crystallography, Russian Academy of Sciences Leninsky pr. 59, 117333 Moscow (Russia)
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  • This short review contains work that was done in collaboration with several co-workers and colleagues. C. Taliani acknowledges G. Ruani and R. Zamboni, who contributed to optical and electroadsorption spectroscopy as well as G. Lanzani and A. J. Pal for the photoinduced absorption work. L. M. Blinov thanks his collaborators S. P. Palto, A. A. Tevosov. and S. G. Yudin. C. Taliani also thanks H. Bässler for many fruitful discussions. Financial support was provided by the EEC research programs Human Capital and Mobility Network SELMAT and Esprit Basic Research LEDFOS, as well as Progetto Strategico Materieali of CNR.

Abstract

The properties of α-sexithiophene (α-T6), e.g., the pronounced one-dimensionality of the molecule (see Figure), the layered crystal packing, and the low exciton binding energy, make it a very interesting material for electronic and optoelectronic applications. Investigations into the origin of its optical gap and conclusions drawn from them are reported.

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