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Band-like charge transport in phytic acid-doped polyaniline thin films

: Ballabio, Marco; Zhang, Tao; Chen, Chen; Zhang, Peng; Liao, Zhongquan; Hambsch, Mike; Mannsfeld, Stefan C.B.; Zschech, Ehrenfried; Sirringhaus, Henning; Feng, Xinliang; Bonn, Mischa; Dong, Renhao; Canovas, Enrique

Volltext ()

Advanced Functional Materials (2021), Online First, Art. 2105184, 9 S.
ISSN: 1616-301X
ISSN: 1616-3028
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IKTS ()
band-like charge transport; conducting polymers; Interfacial Synthesis; polyaniline; thin films

We explore the charge transport properties of phytic acid (PA) doped polyaniline thin films prepared by the surfactant monolayer-assisted interfacial synthesis (SMAIS). Structural and elemental analysis confirms the inclusion of PA in the thin films and reveals a progressive loss of crystallinity with the increase of PA doping content. Charge transport properties are interrogated by time-resolved terahertz (THz) spectroscopy. Notably, independently of doping content and hence crystallinity, the frequency-resolved complex conductivity spectra in the THz region can be properly described by the Drude model, demonstrating band-like charge transport in the samples and state-of-the-art charge carrier mobilities of ≈1 cm2V−1s−1. A temperature-dependent analysis for the conductivity further supports band-like charge transport and suggest that charge carrier mobility is primarily limited by impurity scattering. This work highlights the potential of PA doped polyaniline for organic electronics.