Significant performance improvement in n-channel organic field-effect transistors with C60:C70 co-crystals induced by poly(2-ethyl-2-oxazoline) nanodots
Solution-processed organic field-effect transistors (OFETs) have attracted great interest due to their potential as logic devices for bendable and flexible electronics. In relation to n-channel structures, soluble fullerene semiconductors have been widely studied. However, they have not yet met the...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Wiley
2021
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| _version_ | 1797060586412965888 |
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| author | Nam, S Khim, D Martinez, GT Varambhia, A Nellist, PD Kim, Y Anthopoulos, TD Bradley, DDC |
| author_facet | Nam, S Khim, D Martinez, GT Varambhia, A Nellist, PD Kim, Y Anthopoulos, TD Bradley, DDC |
| author_sort | Nam, S |
| collection | OXFORD |
| description | Solution-processed organic field-effect transistors (OFETs) have attracted great interest due to their potential as logic devices for bendable and flexible electronics. In relation to n-channel structures, soluble fullerene semiconductors have been widely studied. However, they have not yet met the essential requirements for commercialization, primarily because of low charge carrier mobility, immature large-scale fabrication processes, and insufficient long-term operational stability. Interfacial engineering of the carrier-injecting source/drain (S/D) electrodes has been proposed as an effective approach to improve charge injection, leading also to overall improved device characteristics. Here, it is demonstrated that a non-conjugated neutral dipolar polymer, poly(2-ethyl-2-oxazoline) (PEOz), formed as a nanodot structure on the S/D electrodes, enhances electron mobility in n-channel OFETs using a range of soluble fullerenes. Overall performance is especially notable for (C60-Ih)[5,6]fullerene (C60) and (C70-D5h(6))[5,6]fullerene (C70) blend films, with an increase from 0.1 to 2.1 cm2 V−1 s−1. The high relative mobility and eighteen-fold improvement are attributed not only to the anticipated reduction in S/D electrode work function but also to the beneficial effects of PEOz on the formation of a face-centered-cubic C60:C70 co-crystal structure within the blend films. |
| first_indexed | 2024-03-06T20:19:10Z |
| format | Journal article |
| id | oxford-uuid:2d36a243-aa16-4239-ab5b-df1fc16dc636 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:19:10Z |
| publishDate | 2021 |
| publisher | Wiley |
| record_format | dspace |
| spelling | oxford-uuid:2d36a243-aa16-4239-ab5b-df1fc16dc6362022-03-26T12:41:29ZSignificant performance improvement in n-channel organic field-effect transistors with C60:C70 co-crystals induced by poly(2-ethyl-2-oxazoline) nanodotsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:2d36a243-aa16-4239-ab5b-df1fc16dc636EnglishSymplectic ElementsWiley2021Nam, SKhim, DMartinez, GTVarambhia, ANellist, PDKim, YAnthopoulos, TDBradley, DDCSolution-processed organic field-effect transistors (OFETs) have attracted great interest due to their potential as logic devices for bendable and flexible electronics. In relation to n-channel structures, soluble fullerene semiconductors have been widely studied. However, they have not yet met the essential requirements for commercialization, primarily because of low charge carrier mobility, immature large-scale fabrication processes, and insufficient long-term operational stability. Interfacial engineering of the carrier-injecting source/drain (S/D) electrodes has been proposed as an effective approach to improve charge injection, leading also to overall improved device characteristics. Here, it is demonstrated that a non-conjugated neutral dipolar polymer, poly(2-ethyl-2-oxazoline) (PEOz), formed as a nanodot structure on the S/D electrodes, enhances electron mobility in n-channel OFETs using a range of soluble fullerenes. Overall performance is especially notable for (C60-Ih)[5,6]fullerene (C60) and (C70-D5h(6))[5,6]fullerene (C70) blend films, with an increase from 0.1 to 2.1 cm2 V−1 s−1. The high relative mobility and eighteen-fold improvement are attributed not only to the anticipated reduction in S/D electrode work function but also to the beneficial effects of PEOz on the formation of a face-centered-cubic C60:C70 co-crystal structure within the blend films. |
| spellingShingle | Nam, S Khim, D Martinez, GT Varambhia, A Nellist, PD Kim, Y Anthopoulos, TD Bradley, DDC Significant performance improvement in n-channel organic field-effect transistors with C60:C70 co-crystals induced by poly(2-ethyl-2-oxazoline) nanodots |
| title | Significant performance improvement in n-channel organic field-effect transistors with C60:C70 co-crystals induced by poly(2-ethyl-2-oxazoline) nanodots |
| title_full | Significant performance improvement in n-channel organic field-effect transistors with C60:C70 co-crystals induced by poly(2-ethyl-2-oxazoline) nanodots |
| title_fullStr | Significant performance improvement in n-channel organic field-effect transistors with C60:C70 co-crystals induced by poly(2-ethyl-2-oxazoline) nanodots |
| title_full_unstemmed | Significant performance improvement in n-channel organic field-effect transistors with C60:C70 co-crystals induced by poly(2-ethyl-2-oxazoline) nanodots |
| title_short | Significant performance improvement in n-channel organic field-effect transistors with C60:C70 co-crystals induced by poly(2-ethyl-2-oxazoline) nanodots |
| title_sort | significant performance improvement in n channel organic field effect transistors with c60 c70 co crystals induced by poly 2 ethyl 2 oxazoline nanodots |
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