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High-performance field-effect transistors based on furan-containing diketopyrrolopyrrole copolymer under a mild annealing temperature.
- Source :
-
Journal of Polymer Science Part A: Polymer Chemistry . Jul2014, Vol. 52 Issue 14, p1970-1977. 8p. - Publication Year :
- 2014
-
Abstract
- ABSTRACT Two furan-flanked polymers poly{3,6-difuran-2-yl-2,5-di(2-octyldodecyl)-pyrrolo[3,4-c]pyrrole-1,4-dione-alt-thienylenevinylene} (PDVFs), with a highly π-extended diketopyrrolopyrrole backbone, are developed for solution-processed high-performance polymer field-effect transistors (FETs). Atomic force microscopy and grazing incidence X-ray scattering analyses indicate that PDVF-8 and PDVF-10 films exhibit a similar nodular morphology with the ultrasmall lamellar distances of 16.84 and 18.98 Å, respectively. When compared with the reported polymers with the same alkyl substitutes, this is the smallest d-spacing value observed to date. This closed lamellar crystallinity facilitates charge carrier transport. Therefore, polymer thin-film transistors fabricated from as-spun PDVF-8 films exhibit a high hole mobility exceeding 1.0 cm2 V−1 s−1 with a current on/off ratio above 106. After annealing treatment at 100 °C in air, the highest hole mobility of PDVF-8-based FETs was significantly improved to 1.90 cm2 V−1 s−1, which is among the highest values of the reported FET devices fabricated from polymer thin films based on this mild annealing temperature. In contrast, long alkyl-substituted PDVF-10 exhibited a relatively low hole mobility of 1.65 cm2 V−1 s−1 mainly resulting from low molecular weight. This work demonstrated that PDVFs would be promising semiconductors for developing cost-effective and large-scale production of flexible organic electronics. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 1970-1977 [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0887624X
- Volume :
- 52
- Issue :
- 14
- Database :
- Academic Search Index
- Journal :
- Journal of Polymer Science Part A: Polymer Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 96396000
- Full Text :
- https://doi.org/10.1002/pola.27204