Publikation:

Morphology Effectively Controls Singlet-Triplet Exciton Relaxation and Charge Transport in Organic Semiconductors

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2009

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Thorsmølle, Verner K.
Averitt, Richard D.
Smith, D. L.
Tretiak, S.
Martin, R. L.
Chi, X.
Crone, B. K.
Ramirez, A. P.
Taylor, A. J.

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-91729
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https://doi.org/10.1103/PhysRevLett.102.017401
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Published

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Physical Review Letters. 2009, 102, 17401. Available under: doi: 10.1103/PhysRevLett.102.017401

Zusammenfassung

We present a comparative study of ultrafast photoconversion dynamics in tetracene (Tc) and pentacene (Pc) single crystals and Pc films using optical pump-probe spectroscopy. Photoinduced absorption in Tc and Pc crystals is activated and temperature-independent, respectively, demonstrating dominant singlet-triplet exciton fission. In Pc films (as well as C60-doped films) this decay channel is suppressed by electron trapping. These results demonstrate the central role of crystallinity and purity in photogeneration processes and will constrain the design of future photovoltaic devices.

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530 Physik

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ISO 690THORSMØLLE, Verner K., Richard D. AVERITT, Jure DEMSAR, D. L. SMITH, S. TRETIAK, R. L. MARTIN, X. CHI, B. K. CRONE, A. P. RAMIREZ, A. J. TAYLOR, 2009. Morphology Effectively Controls Singlet-Triplet Exciton Relaxation and Charge Transport in Organic Semiconductors. In: Physical Review Letters. 2009, 102, 17401. Available under: doi: 10.1103/PhysRevLett.102.017401
BibTex
@article{Thorsmlle2009Morph-4928,
  year={2009},
  doi={10.1103/PhysRevLett.102.017401},
  title={Morphology Effectively Controls Singlet-Triplet Exciton Relaxation and Charge Transport in Organic Semiconductors},
  volume={102},
  journal={Physical Review Letters},
  author={Thorsmølle, Verner K. and Averitt, Richard D. and Demsar, Jure and Smith, D. L. and Tretiak, S. and Martin, R. L. and Chi, X. and Crone, B. K. and Ramirez, A. P. and Taylor, A. J.},
  note={Article Number: 17401}
}
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