Phys. Rev. B 67, 115202 (2003) [6 pages]Photoexcitations in composites of poly(paraphenylene vinylene) and single-walled carbon nanotubesReceived 25 June 2002; revised 3 December 2002; published 13 March 2003 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. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.67.115202
DOI:
10.1103/PhysRevB.67.115202
PACS:
78.40.Ri, 78.55.Kz, 78.66.Qn, 78.66.Sq
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