Photogeneration of charge carriers in blends of conjugated polymers and semiconducting nanoparticles

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

30 Scopus Citations
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Author(s)

  • M. Pientka
  • J. Wisch
  • S. Böger
  • J. Parisi
  • V. Dyakonov
  • D. Talapin
  • H. Weller

Detail(s)

Original languageEnglish
Pages (from-to)48-53
Journal / PublicationThin Solid Films
Volume451-452
Publication statusPublished - 22 Mar 2004
Externally publishedYes

Conference

TitleProceedings of Symposium D on Thin Film and Nano-Structured
PlaceFrance
CityStrasbourg
Period10 - 13 June 2003

Abstract

Composites of nanoparticles and conjugated polymers are studied via photoluminescence (PL), photoinduced absorption spectroscopy and light induced electron spin resonance (LESR) spectroscopy. Two different types of nanoparticles were investigated namely cadmium selenide and indium phosphide. They were available with a tri-n-octylphosphine-oxide-tri-n-octylphosphine shell or pyridine washed. Nanoparticles were mixed with poly(2-methoxy-5-(3-,7-dimethyloctyloxy)-1,4-phenylenevinylene) (OC 1C10-PPV) in different weight ratios. The quenching of the PL, the formation of polaronic radicals as well as the occurrence of two new absorption bands are explained in the frame of a photoinduced charge transfer between the polymer and the nanocrystal. For a detailed analysis, the lifetime and recombination kinetics are studied by varying the chopper frequency and by changing the laser power. We find a broad distribution of lifetimes, which suggests a dispersive recombination process. With LESR the charge transfer process is confirmed and the g-factor of the polymer cation was determined. Time dependent studies show the involving of long living species in the recombination process. © 2003 Elsevier B.V. All rights reserved.

Research Area(s)

  • Conjugated polymers, Nanocrystals, Organic solar cells, Photoinduced charge transfer

Citation Format(s)

Photogeneration of charge carriers in blends of conjugated polymers and semiconducting nanoparticles. / Pientka, M.; Wisch, J.; Böger, S.; Parisi, J.; Dyakonov, V.; Rogach, A.; Talapin, D.; Weller, H.

In: Thin Solid Films, Vol. 451-452, 22.03.2004, p. 48-53.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review