Polyimide Dielectric Layer on Filaments for Organic Field Effect Transistors: Choice of Solvent, Solution Composition and Dip-Coating Speed

• Autorzy: Rambausek L. , Bruneel E. , De Mey G. , Van Langenhove L.

Identyfikatory

DOI

10.2478/aut-2014-0008

• Języki publikacji: EN

Abstrakty

EN

In today’s research, smart textiles is an established topic in both electronics and the textile fields. The concept of producing microelectronics directly on a textile substrate is not a mere idea anymore and several research institutes are working on its realisation. Microelectronics like organic field effect transistor (OFET) can be manufactured with a layered architecture. The production techniques used for this purpose can also be applied on textile substrates. Besides gate, active and contact layers, the isolating or dielectric layer is of high importance in the OFET architecture. Therefore, generating a high quality dielectric layer that is of low roughness and insulating at the same time is one of the fundamental requirements in building microelectronics on textile surfaces. To evaluate its potential, we have studied polyimide as a dielectric layer, dip-coated onto copper-coated polyester filaments. Accordingly, the copper-coated polyester filament was dip-coated from a polyimide solution with two different solvents, 1-methyl-2-pyrrolidone (NMP) and dimethylformaldehyde. A variety of dip-coating speeds, solution concentrations and solvent-solute combinations have been tested. Their effect on the quality of the layer was analysed through microscopy, leak current measurements and atomic force microscopy (AFM). Polyimide dip-coating with polyimide resin dissolved in NMP at a concentration of 15w% in combination with a dip-coating speed of 50 mm/min led to the best results in electrical insulation and roughness. By optimising the dielectric layer’s properties, the way is paved for applying the subsequent semi-conductive layer. In further research, we will be working with the organic semiconductor material TIPS-Pentacene.

Słowa kluczowe

EN

dip-coating; dielectric; polyimide; polyester filament; fibrous; smart textiles; thin film; transistor

PL

powłoka zanurzeniowa; dielektryk; poliamid; włókna poliestrowe; włóknisty; inteligentne materiały; cienka powłoka; tranzystor

• Wydawca: Lodz University of Technology, Faculty of Material Technologies and Textile Design
• Czasopismo: Autex Research Journal
• Rocznik: 2014
• Tom: Vol. 14, no. 3
• Strony: 121--134
• Opis fizyczny: Bibliogr. 46 poz.

Twórcy

autor

Rambausek L.

• Ghent University - Department of Textiles

autor

Bruneel E.

• Ghent University - Department of Inorganic and Physical Chemistry, Ghent, Belgium, Krijgslaan 281 S3, 9000 Ghent, tel. [phone], fax [phone]

autor

De Mey G.

• Ghent University - Electronics and Information Systems Department, Ghent, Belgium, Sint-Pietersnieuwstraat 41, 9000 Ghent, tel. [phone], fax [phone]

autor

Van Langenhove L.

• Ghent University - Department of Textiles, Ghent, Belgium, Technologiepark 907, 9052 Zwijnaarde, tel [phone], fax [phone]

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