Journal
ACS APPLIED ELECTRONIC MATERIALS
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaelm.2c01136
Keywords
aligned polymers; polymer transistors; nanogrooves; solvent additive; spin coating
Funding
- National Natural Science Foundation of China
- [62275013]
- [61975010]
- [62075009]
Ask authors/readers for more resources
This work demonstrates the fabrication of highly aligned polymer films on nanogrooved substrates using spin coating with the help of an alpha-chloronaphthalene (alpha-CN) additive. The resulting films show high absorbance dichroic ratio and mobility, with comparable or even better performance than other aligned polymer film-based devices reported in the literature.
Chain alignment has been a major method for improving the performance of polymer field effect transistors (PFETs). A nanogrooved substrate is a promising media for fabricating high-performance polymer transistors due to its effectiveness. However, the application of nanogrooved substrates in polymer spin coating suffers from the liquid repelling nature of the substrate. This work demonstrates that with the help of an alpha-chloronaphthalene (alpha-CN) additive in the chloroform solution, the highly aligned poly[4-(4,4-dihexadecyl-4H-cyclopenta [ 1,2-b:5,4-b '] -dithiophen-2-yl)-alt-[ 1,2,5 ]thiadiazolo-[3,4-c]pyridine] (PCDTPT) polymer films can be fabricated by spin coating onto the nanogrooved substrates. The chloroform matrix ensures the uniform film formation, and the incorporation of alpha-CN significantly improves the polymer chain orientation. The resulting PCDTPT thin films show an absorbance dichroic ratio as high as 16, which is among the highest ones ever reported. The polymer field effect transistors based on the aligned PCDTPT films show an average mobility of 4.42 cm2 V-1 s-1 (the highest as 5.03 cm2 V-1 s-1), which is about 6 times that of the control devices with a mean mobility of 0.77 cm2 V-1 s-1. Despite the simplicity of this method, the resulting devices show comparable and even better performances than the aligned polymer film-based devices reported in the literature. The uniaxially aligned spin coated polymer film provides a simple but effective approach to fabricating high-performance PFETs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available