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High-k polymer materials containing cyclic carbonate as gate dielectrics for application in low-voltage operating organic thin-film transistors.
- Source :
- Journal of Materials Chemistry C; 12/28/2019, Vol. 7 Issue 48, p15357-15363, 7p
- Publication Year :
- 2019
-
Abstract
- Low-voltage operation in organic thin-film transistors (OTFTs) is desirable for low power applications and portable electronics. Using polymer materials with a high dielectric constant (high-k) as gate dielectrics is an important way to realize low-voltage operating OTFTs. In this work, we synthesized a class of novel copolymers, which exhibit a high-k up to 7–10 depending on the content of cyclic carbonate. These copolymer materials are easily processed into films with a smooth surface topography and without pinholes by simple spin-coating. Moreover, they show excellent insulation properties with low leakage current densities (<7 × 10<superscript>−7</superscript> A cm<superscript>−2</superscript> at 100 MV m<superscript>−1</superscript>) and small dielectric loss (<0.03, 10<superscript>2</superscript>–10<superscript>5</superscript> Hz). Meanwhile, cross-linked copolymers also display good flexibility and solvent resistance. To inspect their application prospects in low-voltage operating OTFTs, these copolymer films were employed as gate dielectrics to build p- and n-type OTFTs with C<subscript>10</subscript>-DNTT and F<subscript>16</subscript>CuPc as active layers, respectively. As a result, our OTFTs exhibit good field-effect properties at low operating voltages below 10 V, with high hole and electron mobility up to 9.7 and 0.005 cm<superscript>2</superscript> V<superscript>−1</superscript> s<superscript>−1</superscript> on average, respectively. Our results indicate a strategy on design of high-k polymer materials as gate dielectrics to pursue low-voltage operating OTFTs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507526
- Volume :
- 7
- Issue :
- 48
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry C
- Publication Type :
- Academic Journal
- Accession number :
- 140313165
- Full Text :
- https://doi.org/10.1039/c9tc04417e