The absorption spectra of different oligothiophene single crystals without saturation effects in a wide spectral range are reported and compared. The origin of the main ac polarized broad band is discussed in terms of Frenkel excitons. Exploiting experimental configurations which correspond to the excitation of the weak dielectric tensor components, bands of different nature are also detected at different positions for orthogonal polarizations and attributed to transitions of charge-transfer character. (c) 2006 Elsevier B.V. All rights reserved.

Tavazzi, S., Laicini, M., Raimondo, L., Spearman, P., Borghesi, A., Papagni, A., et al. (2006). Evidence of polarized charge-transfer transitions by probing the weak dielectric tensor components of oligothiophene crystals. APPLIED SURFACE SCIENCE, 253(1), 296-299 [10.1016/j.apsusc.2006.05.096].

Evidence of polarized charge-transfer transitions by probing the weak dielectric tensor components of oligothiophene crystals

TAVAZZI, SILVIA;RAIMONDO, LUISA;BORGHESI, ALESSANDRO;PAPAGNI, ANTONIO;TRABATTONI, SILVIA
2006

Abstract

The absorption spectra of different oligothiophene single crystals without saturation effects in a wide spectral range are reported and compared. The origin of the main ac polarized broad band is discussed in terms of Frenkel excitons. Exploiting experimental configurations which correspond to the excitation of the weak dielectric tensor components, bands of different nature are also detected at different positions for orthogonal polarizations and attributed to transitions of charge-transfer character. (c) 2006 Elsevier B.V. All rights reserved.
Articolo in rivista - Articolo scientifico
charge-transfer; oligothiophene; polarized
English
31-ott-2006
253
1
296
299
none
Tavazzi, S., Laicini, M., Raimondo, L., Spearman, P., Borghesi, A., Papagni, A., et al. (2006). Evidence of polarized charge-transfer transitions by probing the weak dielectric tensor components of oligothiophene crystals. APPLIED SURFACE SCIENCE, 253(1), 296-299 [10.1016/j.apsusc.2006.05.096].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/5667
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