Femtosecond and continuous-wave photoexcitations of thiophene-based conjugated polymers

Silva Luzzati; Chiara Botta; Mariachiara Romanoni; Davide Comoretto; Riccardo Tubino; Mauro Nisoli; Alessandro Cybo-Ottone; Sandro De Silvestri

doi:10.1117/12.165283

16 December 1993 Femtosecond and continuous-wave photoexcitations of thiophene-based conjugated polymers

Silva Luzzati, Chiara Botta, Mariachiara Romanoni, Davide Comoretto, Riccardo Tubino, Mauro Nisoli, Alessandro Cybo-Ottone, Sandro De Silvestri

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Proceedings Volume 2025, Nonlinear Optical Properties of Organic Materials VI; (1993) https://doi.org/10.1117/12.165283
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

We present an extensive photoinduced absorption study of alkyl substituted poly (2,5- thienylenevinylene)s in both the solid state and in solution. The optical and conformational properties of the samples are monitored with UV-Vis absorption and emission, IR absorption and Raman scattering. Three photoinduced states are detected under steady state condition which display lifetimes of the order of 100 ms in the solid state. The two low-energy bands are assigned to bipolarons, while a third band peaked near the band edge has a different origin. In solution very lone-lived photoexcitated states are observed and they are assumed to recombine via a solvent-assisted photo-doping mechanism.

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Silva Luzzati, Chiara Botta, Mariachiara Romanoni, Davide Comoretto, Riccardo Tubino, Mauro Nisoli, Alessandro Cybo-Ottone, and Sandro De Silvestri "Femtosecond and continuous-wave photoexcitations of thiophene-based conjugated polymers", Proc. SPIE 2025, Nonlinear Optical Properties of Organic Materials VI, (16 December 1993); https://doi.org/10.1117/12.165283

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