Synergistic use of pyridine and selenophene in a diketopyrrolopyrrole-based conjugated polymer enhances the electron mobility in organic transistors
Article
Article Title | Synergistic use of pyridine and selenophene in a diketopyrrolopyrrole-based conjugated polymer enhances the electron mobility in organic transistors |
---|---|
ERA Journal ID | 1397 |
Article Category | Article |
Authors | Liu, Qian (Author), Kumagai, Shohei (Author), Manzhos, Sergei (Author), Chen, Yingqian (Author), Angunawela, Indunil (Author), Nahid, Masrur Morshed (Author), Feron, Krishna (Author), Bottle, Steven E (Author), Bell, John (Author), Ade, Harald (Author), Takeya, Jun (Author) and Sonar, Prashant (Author) |
Journal Title | Advanced Functional Materials |
Journal Citation | 34 (1) |
Article Number | 2000489 |
Number of Pages | 10 |
Year | 2020 |
Publisher | John Wiley & Sons |
Place of Publication | Germany |
ISSN | 1616-301X |
1616-3028 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/adfm.202000489 |
Web Address (URL) | https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.202000489 |
Abstract | To achieve semiconducting materials with high electron mobility in organic field-effect transistors (OFETs), low-lying energy levels (the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO)) and favorable molecular packing and ordering are two crucial factors. Here, it is reported that the incorporation of pyridine and selenophene into the backbone of a diketopyrrolopyrrole (DPP)-based copolymer produces a high-electron-mobility semiconductor, PDPPy-Se. Compared with analogous polymers based on other DPP derivatives and selenophene, PDPPy-Se features a lower LUMO that can decrease the electron transfer barrier for more effective electron injection, and simultaneously a lower HOMO that, however, can increase the hole transfer barrier to suppress the hole injection. Combined with thermal annealing at 240 °C for thin film morphology optimization to achieve large-scale crystallite domains with tight molecular packing for effective charge transport along the conducting channel, OFET devices fabricated with PDPPy-Se exhibit an n-type-dominant performance with an electron mobility (μe) as high as 2.22 cm2 V−1 s−1 and a hole/electron mobility ratio (μh/μe) of 0.26. Overall, this study demonstrates a simple yet effective approach to boost the electron mobility in organic transistors by synergistic use of pyridine and selenophene in the backbone of a DPP-based copolymer. |
Keywords | electron mobility; electron transport; lowest unoccupied molecular orbital; organic field effect transistors; pyridine-flanked diketopyrrolopyrrole; selenophene |
ANZSRC Field of Research 2020 | 400499. Chemical engineering not elsewhere classified |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Queensland University of Technology |
University of Tokyo, Japan | |
National Institute for Scientific Research, Canada | |
National University of Singapore | |
North Carolina State University, United States | |
Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5x36/synergistic-use-of-pyridine-and-selenophene-in-a-diketopyrrolopyrrole-based-conjugated-polymer-enhances-the-electron-mobility-in-organic-transistors
132
total views7
total downloads3
views this month0
downloads this month