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 m_h ≈ 0.8 m_e.

Date Published: 7 October 2014
PDF: 7 pages
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

Published in SPIE Proceedings Vol. 9185:
Organic Field-Effect Transistors XIII; and Organic Semiconductors in Sensors and Bioelectronics VII
Zhenan Bao; Ruth Shinar; Ioannis Kymissis; Iain McCulloch, Editor(s)