7 October 2014 Terahertz study of hole transport in pentacene thin films
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Abstract
Terahertz electromodulation spectroscopy is a novel tool for studying charge carrier transport in polycrys­talline thin films. The technique selectively probes the high-frequency response of mobile carriers and is insensitive to scattering at grain boundaries as well as to trapping processes. In thin films of pentacene we find a hole mobility of 21 cm2 /Vs, which exceeds the largest previously reported values obtained in poly­ crystalline pentacene. Additionally, the data provide an upper limit of the hole conductivity effective mass of mh ≈ 0.8 me.
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Stefan G. Engelbrecht, Markus Prinz, Thomas R. Arend, Roland Kersting, "Terahertz study of hole transport in pentacene thin films", Proc. SPIE 9185, Organic Field-Effect Transistors XIII; and Organic Semiconductors in Sensors and Bioelectronics VII, 91850S (7 October 2014); doi: 10.1117/12.2060817; https://doi.org/10.1117/12.2060817
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