Physical aging and charge transport in poly(3‐hexylthiophene)

Duzhko, Volodimyr V.

doi:10.1002/pssa.201532307

Physical aging and charge transport in poly(3‐hexylthiophene)

Journal Article · Tue Nov 17 00:00:00 EST 2015 · Physica Status Solidi. A, Applications and Materials Science

DOI:https://doi.org/10.1002/pssa.201532307· OSTI ID:1401635

Duzhko, Volodimyr V. ^[1]

Department of Polymer Science and Engineering University of Massachusetts 120 Governors Drive Amherst MA 01003 USA

The bulk charge transport in a series of regioregular poly(3‐hexylthiophene) materials with different molecular weights (MW) has been studied by the time‐of‐flight technique. Three distinct temperature regions with transitions at ∼60 and ∼140 °C in lower MW material (9.6 kDa), and four regions with an additional transition at ∼180 °C in higher MW material (32.3 kDa) are identified in the temperature dependence of charge carrier mobility and the origin of these transitions is discussed. A pronounced effect of physical aging which reveals as a reversible increase of charge mobility is found. Densification of amorphous phase in‐between the nanocrystals, which reduces the potential energy barriers and provides larger charge transfer integrals, is proposed as an origin of the effect.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

OSTI ID:: 1401635

Alternate ID(s):: OSTI ID: 1370285

Journal Information:: Physica Status Solidi. A, Applications and Materials Science, Journal Name: Physica Status Solidi. A, Applications and Materials Science Journal Issue: 2 Vol. 213; ISSN 1862-6300

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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