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

O. Ostroverkhova, David Cooke, F. A. Hegmann, J. E. Anthony, V. Podzorov, M. E. Gershenson, O. D. Jurchescu, T. T. M. Palstra

Research output: Contribution to journalJournal articleResearch

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. (c) 2006 American Institute of Physics.
Original languageEnglish
JournalApplied Physics Letters
Volume88
Issue number16
Pages (from-to)162101
ISSN0003-6951
DOIs
Publication statusPublished - 2006
Externally publishedYes

Cite this

Ostroverkhova, O., Cooke, D., Hegmann, F. A., Anthony, J. E., Podzorov, V., Gershenson, M. E., 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