A study of C-60-poly(m-phenylenevinylene-co-2,5-dioctoxy-p-phenylenevinylene) nanocomposite

作者：Wondmagegn W T^*; Curran S A

来源：Thin Solid Films, 2006, 515(4): 2393-2397.

DOI：10.1016/j.tsf.2006.05.002

• fullerene
• nanocomposite
• polymers
• poly(m-phenylenevinylene-co-2,5-dioctoxy-p-phenylenevinylene)
• photoconductivity
• atomic force microscopy
• near-field scanning fluorescence microscopy

We present spectroscopic and conductivity studies of poly(m-phenylenevinylene-co-2,5-dioctoxy-p-phenylenevinylene) (PMPV)/C-60 composite. The UV-Vis absorption spectroscopy, resonance Raman spectroscopy, near-field scanning optical and atomic force microscopy, and fluorescence spectroscopy confirm charge transfer and excitonic transitions between both materials in the composite morphology. Both UV-Vis and fluorescence spectra have shown the existence of an electron transfer from the polymer to C-60, while broadening of the already existing peak at 624 cm(-1) and the appearance of a new broad peak at 1850 cm(-1) for the Raman spectra are due to exciton generation. The results from the conductivity measurements also show enhanced responsiveness with increasing C-60 concentration. We observe consistent dark and photocurrent increase due to C-60 encapsulation by PmPV, where the composite has much better charge transfer capacity and better responsiveness to exciton generation.

• 出版日期2006-12-5