The paper reports on a comparative study of poly(3-hexylthiophene) (P3HT) films as well as P3HT organic field effect transistors (OFETs) fabricated by the spin coating and spray coating techniques, using fresh and aged (for 2 months) chloroform solutions. The films obtained from aged solutions contain nanostructured fibers of the polymer. The presence of nanofibers in P3HT thin films affects the performance of the OFETs: charge carrier mobilities in the samples deposited from the aged solutions appeared over one order of magnitude higher than those fabricated using fresh solutions. Particularly high mobilities, exceeding 10−2 cm2 V−1 s−1, were found in spin coated samples deposited from aged solutions. Additionally, the latter samples exhibit a certain degree of anisotropy, associated with the action of centrifugal force during the deposition.
|Journal||Organic Electronics: physics, materials, applications|
|Publication status||Published - 1 Nov 2011|
Bielecka, U., Lutsyk, P., Janus, K., Sworakowski, J., & Bartkowiak, W. (2011). Effect of solution aging on morphology and electrical characteristics of regioregular P3HT FETs fabricated by spin coating and spray coating. Organic Electronics: physics, materials, applications, 12(11), 1768-1776. https://doi.org/10.1016/j.orgel.2011.06.027