Stable Hall voltages in presence of dynamic quasi-continuum bands in poly (3,4-ethylene-dioxythiophene)

Stadler, Philipp and Leonat, Lucia N and Menon, Reghu and Coskun, Halime and van Frank, Sandrine and Rankl, Christian and Scharber, Markus C (2019) Stable Hall voltages in presence of dynamic quasi-continuum bands in poly (3,4-ethylene-dioxythiophene). In: ORGANIC ELECTRONICS, 65 . pp. 412-418.

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Abstract

Topological and thermal disorder complicate the mobility characterization in poly(3,4-ethylenedioxythiophene) systems and presently leaves the exact transport mechanisms not fully understood. Here we show that ac-Hall measured by lock-in amplifier is able to resolve the Hall voltage in semimetallic polymers between room temperature and 32 K. These results are evaluated using an organic random phase model. This accounts for the role of tail states and, particularly, for thermal disorder of molecular semiconductors. We report band mobilities up to 3.7 cm(2) V-1 s(-1) in semimetallic polymers occurring in delocalized bands that originate from significant electron coherence across the polymer chains.

Item Type:	Journal Article
Publication:	ORGANIC ELECTRONICS
Publisher:	ELSEVIER SCIENCE BV
Additional Information:	Copyright of this article belongs to ELSEVIER SCIENCE BV
Keywords:	Hall-effect; Conducting polymers; Weak localization; Organic phase model; Electron coherence; PEDOT
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	25 Jan 2019 12:43
Last Modified:	25 Jan 2019 12:43
URI:	http://eprints.iisc.ac.in/id/eprint/61429

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