Femtosecond dynamics in single wall carbon nanotube/poly(3-hexylthiophene) composites
Date
2008ISSN
1931-7573Source
Nanoscale Research LettersVolume
3Issue
8Pages
278-283Google Scholar check
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Femtosecond transient absorption measurements on single wall carbon nanotube/poly(3-hexylthiophene) composites are used to investigate the relaxation dynamics of this blended material. The influence of the addition of nanotubes in polymer matrix on the ultrashort relaxation dynamics is examined in detail. The introduction of nanotube/polymer heterojunctions enhances the exciton dissociation and quenches the radiative recombination of composites. The relaxation dynamics of these composites are compared with the fullerene derivative-polymer composites with the same matrix. These results provide explanation to the observed photovoltaic performance of two types of composites.
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