Morphological impact of insulator on inkjet-printed transistor. (28th September 2017)

• Record Type: Journal Article
• Authors: Moon, Sjeung Jae; Robin, Malo; Wenlin, Kuai; Yann, Molard; Bae, Byung Seong; Mohammed-Brahim, Tayeb; Jacques, Emmanuel; Harnois, Maxime
• Is Part Of: Flexible and printed electronics. Volume 2:Number 3(2017)
• Publication Date: 2017-09-28
• Subjects: inkjet printing -- organic field effect transistors -- polymeric insulator -- access resistance -- drop on demand; Flexible electronics -- Periodicals; Printed electronics -- Periodicals; Flexible electronics; Printed electronics; Electronic journals; Periodicals; 621.381
• DOI: 10.1088/2058-8585/aa8760
• Languages: English
• ISSNs: 2058-8585

Abstract

Abstract: This study reports on the impact of electrodes (source and drain) and the insulator cross-sectional profile on the electrical behavior of printed organic field effect transistors (OFETs). Varying processing techniques, from classical lithography to inkjet printing, show different cross-sectional profiles. Indeed, due to the coffee stain effect (usually considered a drawback), the inkjet-printed insulator shows a wave-shaped profile although the spin-coated one is perfectly smooth. However, OFET electrical behavior is not drastically impacted by the insulator cross-sectional profile. Moreover, this study clearly demonstrates that independently of the insulator cross-sectional profile, OFETs fabricated with printed electrodes show the worst electrical characteristics. Consequently, this work clearly demonstrates that a challenging issue for the fabrication of efficient fully-printed OFETs relies on drain and source optimization (for instance, morphology or material).