Triacetate cellulose gate dielectric organic thin-film transistors |
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| Affiliation: | 1. Department of Mechanical Engineering, Berkeley Sensor and Actuator Center, University of California, Berkeley, CA, 94720, United States;2. Interaction Laboratory of Advanced Technology Research Center, Korea University of Technology and Education, 1800 Chungjeollo, Byeongcheon-Myeon, Cheonan-City 330-708, Chungnam Province, South Korea;1. Department of Electrical & Electronics Engineering, Bogazici University, Istanbul, Turkey;2. Department of Chemistry, Bogazici University, Istanbul, Turkey;1. School of Electrical and Electronic Engineering, University of Manchester, Sackville Street, Manchester M13 9PL, UK;2. Corrosion & Protection Centre, School of Materials, University of Manchester, The Mill, Sackville Street, Manchester M13 9PL, UK;3. School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK |
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| Abstract: | Here, we report on the performance and the characterization of all solution-processable top-contact organic thin-film transistors (OTFTs) consisting of a natural-resourced triacetate cellulose gate dielectric and a representative hole-transport poly2,5-bis(3-dodecylthiophen-2-yl)thieno3,2-b]thiophene] (pBTTT) semiconductor layer on rigid or flexible substrates. The bio-based triacetate cellulose layer has an important role in the OTFT fabrication because it provides the pBTTT semiconducting polymer with highly suitable gate dielectric properties including a low surface roughness, hydrophobic surface, appropriate dielectric constant, and low leakage current. The triacetate cellulose gate dielectric-based pBTTT OTFTs exhibit an average filed-effect mobility of 0.031 cm2/Vs similar to that obtained from a SiO2 gate dielectric-based OTFT device in ambient conditions. Even after a bending stimulation of 100 times and in an outward bending state, the flexible triacetate cellulose gate pBTTT OTFT device still showed excellent electrical device performance without any hysteresis. |
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| Keywords: | Triacetate cellulose Eco-friendly gate dielectric polymer pBTTT semiconductor Flexible organic thin film transistors |
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