High ambipolar and balanced carrier mobility in regioregular poly(3-hexylthiophene)

The carrier transport of carefully purified regioregular poly(3-hexylthiophene) films has been studied using time-of-flight photocurrent measurements. We find balanced ambipolar transport with a room-temperature mobility for holes of 3 × 10 − 4 cm 2 V − 1 s − 1 and for electrons of 1.5 × 10 − 4 cm 2...

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Bibliographic Details
Published in:Applied physics letters 2004-10, Vol.85 (17), p.3890-3892
Main Authors: Choulis, S. A., Kim, Y., Nelson, J., Bradley, D. D. C., Giles, M., Shkunov, M., McCulloch, I.
Format: Article
Language:English
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Summary:The carrier transport of carefully purified regioregular poly(3-hexylthiophene) films has been studied using time-of-flight photocurrent measurements. We find balanced ambipolar transport with a room-temperature mobility for holes of 3 × 10 − 4 cm 2 V − 1 s − 1 and for electrons of 1.5 × 10 − 4 cm 2 V − 1 s − 1 at electric fields ⩾ 10 5 V ∕ cm . The transport is relatively field independent and weakly temperature dependent, pointing to a high degree of chemical regioregularity and purity. These factors make poly(3-hexylthiophene) attractive for use in a range of electronic applications.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1805175