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Journal of Materials Science

, Volume 46, Issue 16, pp 5363–5370 | Cite as

Synthesis and characterization of novel poly(aryleneethynylene)s derived from squaraines for photovoltaic applications

  • Wei Zhang
  • Feng Tao
  • Kai-ge Meng
  • Zheng Wang
  • Long-yi Xi
  • Ying LiEmail author
  • Qing Jiang
Article
First Online:

Abstract

Two novel π-conjugated polymers composed of alkyl carbazole/dialkoxyphenylene and squaraine units were synthesized by Sonogashira cross-coupling reactions. The structures and properties of these copolymers were characterized using FT-IR, NMR, UV–Vis, gel permeation chromatography and cyclic voltammetry (CV). Both polymers possess adequate thermal stability and exhibit good solubility in common organic solvents such as chloroform, THF, and toluene. The polymer films show intense and broad visible and near IR absorption with the long wavelength absorption maximum peaks of 796 and 851 nm for P1 and P2, respectively, which are apparently red-shifted compared with poly(phenyleneethynylene). CV studies reveal that the band gaps of these copolymers are about 1.45 eV, implying that the resulted polymers may be promising candidates for solar cells.

Keywords

High Occupied Molecular Orbital Lower Unoccupied Molecular Orbital Carbazole Thermal Gravimetric Analysis Intramolecular Charge Transfer 
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Notes

Acknowledgements

This study was supported by the key foundation of education ministry of China (20070610053) and Sichuan Province Foundation for Youths (2008JY0050). The authors also acknowledge the Analytical & Testing Center of Sichuan University for the NMR measurements.

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Wei Zhang
    • 1
  • Feng Tao
    • 1
  • Kai-ge Meng
    • 1
  • Zheng Wang
    • 1
  • Long-yi Xi
    • 1
  • Ying Li
    • 1
    Email author
  • Qing Jiang
    • 1
  1. 1.College of ChemistrySichuan UniversityChengduChina

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