Absorption and photoluminescence (PL) studies have been carried out on pristine standard poly(paraphenylene vinylene) PPV and a series of PPV-single-walled carbon nanotubes (SWNT) composite films. Drastic changes in the PL and absorption spectra are observed with the increase of the SWNT fraction. A model is presented which is able to explain quantitatively the modification of absorption spectra, and particularly the new features in PL spectra as a function of SWNT percentages in the films. We provide evidence for strong electronic interaction between SWNT and the PPV polymer precursor precluding the complete thermal conversion of the polymer matrix.
Photoexcitations in composites of PPV and single-walled nanotubes / J. Wery, H. Harab, S. Lefrant, E. Faulques, E. Mulazzi, R. Perego. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 67:11(2003), pp. 115202-1-115202-6.
Photoexcitations in composites of PPV and single-walled nanotubes
E. Mulazzi;
2003
Abstract
Absorption and photoluminescence (PL) studies have been carried out on pristine standard poly(paraphenylene vinylene) PPV and a series of PPV-single-walled carbon nanotubes (SWNT) composite films. Drastic changes in the PL and absorption spectra are observed with the increase of the SWNT fraction. A model is presented which is able to explain quantitatively the modification of absorption spectra, and particularly the new features in PL spectra as a function of SWNT percentages in the films. We provide evidence for strong electronic interaction between SWNT and the PPV polymer precursor precluding the complete thermal conversion of the polymer matrix.
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