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Effect of Fluorination on Molecular Orientation of Conjugated Polymers in High Performance Field-Effect Transistors
- Source :
- Macromolecules. 49:6431-6438
- Publication Year :
- 2016
- Publisher :
- American Chemical Society (ACS), 2016.
-
Abstract
- Fluorinated conjugated polymers have been widely used in high performance polymer solar cells, but they showed limited application in field-effect transistors (FETs). In this paper, we focus on the influence of fluorine atoms upon charge transport of conjugated polymers in FET devices. Two series of conjugated polymers without or with fluorine atoms were designed and applied into FETs. Nonfluorinated conjugated polymers show high hole mobilties up to 11.16 cm2 V–1 s–1, while fluorinated polymers exhibit low hole mobilities below 1.80 cm2 V–1 s–1. Further investigation by differential scanning calorimetry (DSC) and 2D grazing-incidence wide-angle X-ray scattering (2D-GIWAXS) reveal that fluorinated conjugated polymers show low crystallinity and “face-on” orientation in thin films, explaining their poor hole mobilities in FET devices. Our results clearly show how the chemical structures influence the charge transport properties, which can be used to design new conjugated polymers toward high performance FETs.
- Subjects :
- chemistry.chemical_classification
Materials science
Polymers and Plastics
Scattering
Organic Chemistry
chemistry.chemical_element
02 engineering and technology
Polymer
Conjugated system
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Inorganic Chemistry
Crystallinity
Differential scanning calorimetry
chemistry
Chemical engineering
Polymer chemistry
Materials Chemistry
Fluorine
Field-effect transistor
Thin film
0210 nano-technology
Subjects
Details
- ISSN :
- 15205835 and 00249297
- Volume :
- 49
- Database :
- OpenAIRE
- Journal :
- Macromolecules
- Accession number :
- edsair.doi...........9abb0d82ed6c3cd62257e4d7a4bdd87c