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Photophysical and photovoltaic properties of a PPV type copolymer containing alternated fluorene and thiophene units

  • Paula C. Rodrigues
  • Isabel Grova
  • Douglas J. Coutinho
  • Raquel A. Domingues
  • Heong Sub Oh
  • Jangwon Seo
  • Roberto M. Faria
  • Teresa D. Z. Atvars
  • Paras N. Prasad
  • Leni Akcelrud
Original Paper

Abstract

The synthesis and photophysical characterization of a PPV-type copolymer containing a fluorene derivative alternated with thiophene units is presented: poly(9,9’-dioctylfluorene-thiophene) (LAPPS29). Photophysical studies demonstrated that in the solid state only preformed ground state aggregates are responsible for exciton formation. These aggregates are formed with a wide range of size distribution. The emission from isolated segments is quenched either by resonant energy transfer, or by migration processes. Also, the main photovoltaic parameters are discussed in connection with the photophysical behavior.

Keywords

Photophysical properties Photovoltaic cells Conjugated polymers Fluorene Thiophene 

Notes

Acknowledgements

CNPq (Process 202152/2007-3), FAPESP, CAPES, CNPq/FAPESP/INEO for financial supports and fellowships. Thanks are due to Professor Patrick Meares (Exeter University, Great Britain) for helpful discussions in the preparation of the manuscript.

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Paula C. Rodrigues
    • 1
  • Isabel Grova
    • 1
  • Douglas J. Coutinho
    • 2
  • Raquel A. Domingues
    • 3
  • Heong Sub Oh
    • 4
  • Jangwon Seo
    • 4
  • Roberto M. Faria
    • 2
  • Teresa D. Z. Atvars
    • 3
  • Paras N. Prasad
    • 4
  • Leni Akcelrud
    • 1
  1. 1.Paulo Scarpa Polymer Laboratory (LaPPS)Federal University of ParanaCuritibaBrazil
  2. 2.Institute of PhysicsSão Paulo UniversitySão CarlosBrazil
  3. 3.Institute of ChemistryState University of CampinasCampinasBrazil
  4. 4.Institute for Lasers, Photonics and Biophotonics (ILPB) – University at BuffaloState University of New YorkBuffaloUSA

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