Organic semiconductor composites: Influence of additives on the transient photocurrent

Jonathan Day, Andrew D. Platt, Oksana Ostroverkhova, Sankar Subramanian, John E. Anthony

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


We report on the effect of various guest molecules added to a functionalized anthradithiophene (ADT) host on photoexcited charge carrier dynamics in solution-deposited thin films, from ∼100 ps to >100 μs after photoexcitation with 100 fs laser pulses. An addition of 2 and 5 wt % of C60 to a fluorinated ADT derivative, ADT-TES-F, resulted in transient photocurrent amplitude enhancement by a factor of ∼3 and 10, respectively. In contrast, an addition of 10 wt % of another ADT derivative, ADT-TIPS-CN, or a functionalized pentacene derivative (TIPS pentacene) to ADT-TES-F led to a decrease in the amplitude by a factor of ∼3-4 and dramatically different photocurrent dynamics.

Original languageEnglish
Article number013306
JournalApplied Physics Letters
Issue number1
StatePublished - 2009

Bibliographical note

Funding Information:
We thank Professor Y.-S. Lee and J. Tomaino for technical assistance. This work was supported in part by the Petroleum Research Fund, ONR (directly and via ONAMI Nanometrology and Nanoelectronics Initiative Grant No. N00014-07-1-0457), and NSF via CAREER program (Contract No. DMR-0748671).

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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