Long-range polymer ordering by directional coating to remarkably enhance the charge carrier mobility in PCDTPT-based organic field-effect transistors.
| Autor: | Iqbal MJ; Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan., Saghir K; Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan., Afzal T; Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan., Almutairi BS; Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, P.O.Box 84428, Riyadh 11671, Saudi Arabia., Iqbal MZ; Faculty of Engineering Sciences, GIK Institute of Engineering Sciences and Technology, Topi, Khyber Pakhtunkhwa 23640, Pakistan., Raza MA; Institute of Metallurgy and Materials Engineering, University of the Punjab, Lahore 54590, Pakistan., Riaz S; Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan. |
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| Jazyk: | angličtina |
| Zdroj: | Royal Society open science [R Soc Open Sci] 2024 May 22; Vol. 11 (5), pp. 240153. Date of Electronic Publication: 2024 May 22 (Print Publication: 2024). |
| DOI: | 10.1098/rsos.240153 |
| Abstrakt: | With the wide potential of organic field-effect transistors in all the modern electronic circuitries, researchers are grappling with the challenge of poor charge transport and hence lower mobility in organic polymers. Low-charge carrier mobility is mainly due to disorder in the molecular packing of organic semiconductors along with other factors, such as impurities, defects and interactions between molecules. The current research work has been conducted to align the molecular chains of 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) using directional coating techniques such as dip coating and brush coating on nano-grooved substrates. Long-range order of polymer chains was clearly observed along the direction of brush coating and nanogrooves in optical and atomic force microscope (AFM) images while transmission spectra confirmed decreased pi-pi stacking for the polymer films deposited by this technique. By comparing the mobility performance of brush-coated devices with other techniques, we found a remarkable mobility enhancement of 90 times that of conventional spin-coated device and 24 times enhancement compared with the dip-coated device for the case when the alignment of polymer chains was parallel to the channel. All the fabrication and characterizations were performed in the ambient environment. This study demonstrates a potential approach to align the polymers on long and short ranges hence providing a route for high-performing devices in ambient conditions. Competing Interests: We declare we have no competing interests. (© 2024 The Authors.) |
| Databáze: | MEDLINE |
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