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

Choulis, S. A.; Kim, Y.; Nelson, J.; Bradley, D. D. C.; Giles, M.; Shkunov, M.; McCulloch, I.
October 2004
Applied Physics Letters;10/25/2004, Vol. 85 Issue 17, p3890
Academic Journal
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 cm2 V-1 s-1 and for electrons of 1.5×10-4 cm2 V-1 s-1 at electric fields >=105 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.


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