Effect of solution aging on morphology and electrical characteristics of regioregular P3HT FETs fabricated by spin coating and spray coating

U. Bielecka, P. Lutsyk, K. Janus, J. Sworakowski, W. Bartkowiak

Research output: Contribution to journalArticle

Abstract

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.
Original languageEnglish
Pages (from-to)1768-1776
JournalOrganic Electronics: physics, materials, applications
Volume12
Issue number11
DOIs
Publication statusPublished - 1 Nov 2011

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    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