Synthesis and characterization of a charm-bracelet-type poly(N-vinylcarbazole)–C60 double-cable polymer
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  • 作者:Alagar Ramar ; Ramiah Saraswathi
  • 刊名:Journal of Materials Science
  • 出版年:2015
  • 出版时间:May 2015
  • 年:2015
  • 卷:50
  • 期:10
  • 页码:3740-3749
  • 全文大小:962 KB
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文摘
A charm-bracelet-type poly(N -vinylcarbazole) (PVK)–fullerene (C60) donor–acceptor double-cable polymer was synthesized. The covalent attachment of C60 to PVK was confirmed by 1H NMR and FT-IR spectra. Elemental analysis results provided the information that one C60 molecule was present for every seven N-vinylcarbazole units of the polymer corresponding to a fullerene content of 34.76?wt%. The UV–Visible absorption and cyclic voltammetry data indicated that PVK–C60 retained the electronic properties of both PVK and C60. Density functional theory calculations were carried out to determine the LUMO and HOMO energy levels of PVK–C60. The occurrence of photoinduced electron transfer from PVK to C60 was confirmed by photoluminescence techniques. The positioning of the energy levels of PVK–C60 suggests that there is a great scope for achieving a highly efficient molecular heterojunction solar cell with a high open-circuit voltage.

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