Ultrafast carrier dynamics in pentacene, functionalized pentacene, tetracene, and rubrene single crystals

O. Ostroverkhova, D. G. Cooke, F. A. Hegmann, J. E. Anthony, Vitaly Podzorov, Michael Gershenson, O. D. Jurchescu, T. T.M. Palstra

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Abstract

We measure the transient photoconductivity in pentacene, functionalized pentacene, tetracene, and rubrene single crystals using optical pump-terahertz probe techniques. In all of the samples studied, we observe subpicosecond charge photogeneration and a peak photoconductive response that increases as the temperature decreases from 297 down to 20 K, indicative of bandlike transport. Similar decay dynamics are observed at room temperature, but at low temperatures the decay dynamics measured in pentacene, rubrene, and tetracene crystals are much faster than those observed in functionalized pentacene crystals, revealing different charge trapping properties.

Original languageEnglish (US)
Article number162101
JournalApplied Physics Letters
Volume88
Issue number16
DOIs
StatePublished - Apr 17 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Ostroverkhova, O., Cooke, D. G., Hegmann, F. A., Anthony, J. E., Podzorov, V., Gershenson, M., Jurchescu, O. D., & Palstra, T. T. M. (2006). Ultrafast carrier dynamics in pentacene, functionalized pentacene, tetracene, and rubrene single crystals. Applied Physics Letters, 88(16), [162101]. https://doi.org/10.1063/1.2193801