Skip to content
BY-NC-ND 3.0 license Open Access Published by De Gruyter Open Access September 30, 2014

Surface Morphology of Polyimide Thin Film Dip-Coated on Polyester Filament for Dielectric Layer in Fibrous Organic Field Effect Transistor

  • Lina Rambausek EMAIL logo , Els Bruneel , Isabel Van Driessche and Lieva Van Langenhove
From the journal Autex Research Journal

Abstract

The idea of wearable electronics automatically leads to the concept of integrating electronic functions on textile substrates. Since this substrate type implies certain challenges in comparison with their rigid electronic companions, it is of utmost importance to investigate the application of materials for generating the electronic functions on the textile substrate. Only when interaction of materials and textile substrate is fully understood, the electronic function can be generated on the textile without changing the textile’s properties, being flexible or stretchable. This research deals with the optimization of the dielectric layer in a fibrous organic field effect transistor (OFET). A transistor can act as an electrical switch in a circuit. In this work, the polyimide layer was dip-coated on a copper-coated polyester filament. After thoroughly investigating the process conditions, best results with minimal thickness and roughness at full insulation could be achieved at a dip-coating speed of 50 mm/min. The polyimide solution was optimal at 15w% and the choice for the solvent NMP was made. In this paper, details on the pre-treatment methods, choice of solvent and dip-coating speed and their effect on layer morphology and thickness, electrical properties and roughness are reported. Results show that the use of polyimide as a dielectric layer in the architecture of a fibrous OFET is promising. Further research deals with the application of the semiconductor layer within the mentioned architecture, to finally build an OFET on a filament for application in smart textiles.

References

[1] Maccioni, M., et al., Towards the textile transistor: Assembly and characterization of an organic field effect transistor with a cylindrical geometry. Applied Physics Letters, 2006. 89(14).10.1063/1.2357030Search in Google Scholar

[2] Van Genabet, B., Synthesis and characterisation of copper, polyimide and TIPS-pentacene layers in the development of a solution processed fibrous transistor, in Master Thesis Universiteit Gent2010, Universiteit Gent: Gent.10.1063/1.3656743Search in Google Scholar

[3] Cardoen, J., Ontwikkeling van transistor vezels, in Master Thesis Universiteit Gent 2007.Search in Google Scholar

[4] PlasticElectronics, SYSTEX D5 5 VISION PAPER 2011.Search in Google Scholar

[5] Cherenack, K. and L. van Pieterson, Smart textiles: Challenges and opportunities. Journal of Applied Physics, 2012. 112(9).10.1063/1.4742728Search in Google Scholar

[6] Marculescu, D., et al., Electronic textiles: A platform for pervasive computing. Proceedings of the Ieee, 2003. 91(12): p. 1995-2018.10.1109/JPROC.2003.819612Search in Google Scholar

[7] Marculescu, D., et al., Challenges and opportunities in electronic textiles modeling and optimization, in 39th Design Automation Conference, Proceedings 20022002. p. 175-180.Search in Google Scholar

[8] Wagner, H. D., E. Wiesel, and H. E. Gallis, SPREADING OF LIQUID DROPLETS ON CYLINDRICAL SURFACES - ACCURATE DETERMINATION OF CONTACT-ANGLE. Interfaces in Composites, ed. C. G. Pantano and E. J. H. Chen. Vol. 170. 1990. 141-145.10.1557/PROC-170-141Search in Google Scholar

[9] Schwarz, A., et al., Steps Towards a Textile-Based Transistor: Development of the Gate and Insulating Layer. Textile Research Journal, 2010. 80(16): p. 1738-1746.10.1177/0040517510365948Search in Google Scholar

[10] Feili, D., et al., Flexible organic field effect transistors for biomedical microimplants using polyimide and parylene C as substrate and insulator layers. Journal of Micromechanics and Microengineering, 2006. 16(8): p. 1555-1561.10.1088/0960-1317/16/8/016Search in Google Scholar

[11] UGent, Why Textiles? - Benefits of Textiles. Smart Textiles Salon Vol.3, 2013. 3.Search in Google Scholar

[12] Min, H. G., et al., Behavior of pentacene molecules deposited onto roughness-controlled polymer dielectrics films and its effect on FET performance. Synthetic Metals, 2013. 163: p. 7-12.10.1016/j.synthmet.2012.12.007Search in Google Scholar

[13] Shi, W. W., et al., Progress of the improved mobilities of organic field-effect transistors based on dielectric surface modification. Acta Physica Sinica, 2012. 61(22).10.7498/aps.61.228502Search in Google Scholar

[14] Iazykov, M., et al., Atomic force microscopy analysis of morphology of thin pentacene films deposited on parylene-C and benzocyclobutene. Surface Science, 2013. 607: p. 170-173.10.1016/j.susc.2012.09.001Search in Google Scholar

[15] PROETex, D8.1 Report on fibre design for different electronic functions (transistors, sensors), 2007.Search in Google Scholar

[16] Bormashenko, E., et al., Mesoscopic and submicroscopic patterning in thin polymer films: Impact of the solvent. Materials Letters, 2005. 59(19-20): p. 2461-2464.10.1016/j.matlet.2005.03.015Search in Google Scholar

[17] Arfsten, N. J., et al., Investigations on the angle-dependent dip coating technique (ADDC) for the production of optical filters. Journal of Sol-Gel Science and Technology, 1997. 8(1-3): p. 1099-1104.10.1007/BF02436990Search in Google Scholar

[18] Kim, J. H., et al., Phase behavior and mechanism of membrane formation for polyimide/DMSO/water system. Journal of Membrane Science, 2001. 187(1-2): p. 47-55.10.1016/S0376-7388(00)00648-7Search in Google Scholar

[19] Guo, M. C. and X. G. Wang, SYNTHESIS AND CHARACTERIZATION OF POLYIMIDE WITH MAIN- CHAIN PHOTOSENSITIVE GROUPS AND HYDROXYL SIDE-GROUPS. Acta Polymerica Sinica, 2008(11): p. 1113-1117.10.3724/SP.J.1105.2008.01113Search in Google Scholar

[20] Ren, H. F., et al., Polyimide containing isosorbide units: Synthesis and characterization. Acta Polymerica Sinica, 2006(2): p. 248-252.10.3724/SP.J.1105.2006.00248Search in Google Scholar

[21] Van Genabet, B., et al., Synthesis and characterization of copper, polyimide and TIPS-pentacene layers for the development of a solution processed fibrous transistor. Aip Advances, 2011. 1(4).10.1063/1.3656743Search in Google Scholar

[22] DuPont. Kapton¯ polyimide film. 2012 [cited 2013 19.07. - 14:31]; Available from: http://www2.dupont.com/Kapton/en_US/.Search in Google Scholar

[23] AlfaAesar, Product Bulletin, Stock #43656. 2013: p. 1.Search in Google Scholar

[24] Schwarz, A., Analysis of wetting behaviour of an inclined fibre, 2005, Kaunas University of Technology: Kaunas.Search in Google Scholar

[25] Warmoeskerken, M., Advanced and specialised textile processing, 2008, Univeristy of Twente: Twente, NL.Search in Google Scholar

[26] Bouyer, D., et al., Morphological properties of membranes fabricated by VIPS process using PEI/NMP/water system: SEM analysis and mass transfer modelling. Journal of Membrane Science, 2010. 349(1-2): p. 97-112.10.1016/j.memsci.2009.11.036Search in Google Scholar

[27] Menut, P., et al., Structure formation of poly (ether-imide) films using non-solvent vapor induced phase separation: relationship between mass transfer and relative humidity. Desalination, 2002. 145(1-3): p. 11-16.10.1016/S0011-9164(02)00323-5Search in Google Scholar

[28] Yong-Hoon, K., et al., Influence of solvent on the film morphology, crystallinity and electrical characteristics of triisopropylsilyl pentacene OTFTs. Journal of the Electrochemical Society, 2007. 154(12): p. H995-H998.10.1149/1.2783765Search in Google Scholar

[29] Kim, J., et al., All-solution-processed bottom-gate organic thin-film transistor with improved subthreshold behaviour using functionalized pentacene active layer. Journal of Physics D-Applied Physics, 2009. 42(11).10.1088/0022-3727/42/11/115107Search in Google Scholar

[30] Choi, M. H., et al., Effect of active layer thickness on environmental stability of printed thin-film transistor. Organic Electronics, 2009. 10(3): p. 421-425.10.1016/j.orgel.2009.01.003Search in Google Scholar

[31] Someya, T., et al., A large-area, flexible pressure sensor matrix with organic field-effect transistors for artificial skin applications. Proceedings of the National Academy of Sciences of the United States of America, 2004. 101(27): p. 9966-9970.10.1073/pnas.0401918101Search in Google Scholar PubMed PubMed Central

Published Online: 2014-9-30

© 2014 Autex Research Journal

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Downloaded on 29.3.2024 from https://www.degruyter.com/document/doi/10.2478/aut-2014-0012/html
Scroll to top button