Pronounced Side Chain Effects in Triple Bond-Conjugated Polymers Containing Naphthalene Diimides for n-Channel Organic Field-Effect Transistors
SCIE
SCOPUS
- Title
- Pronounced Side Chain Effects in Triple Bond-Conjugated Polymers Containing Naphthalene Diimides for n-Channel Organic Field-Effect Transistors
- Authors
- Nam, Sungho; Hahm, Suk Gyu; Khim, Dongyoon; Kim, Hwajeong; Sajoto, Tissa; Ree, Moonhor; Marder, Seth R.; Anthopoulos, Thomas D.; Bradley, Donal D. C.; Kim, Youngkyoo
- Date Issued
- 2018-04
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Three triple bond-conjugated naphthalene diimide (NDI) copolymers, poly{[N,N'-bis(2-R-1)-naphtha-lene-1,4,5,8-bis(dicarboxlinid e)-2,6- diyl] [(2,5-bis (2-R-2) 1,4-phenylene)bis(ethyn-2,1-diyl)1} (PNDIR1-R-2), were synthesized via Sonogashira coupling polymerization with varying alkyl side chains at the nitrogen atoms of the imide ring and 2,5-positions of the 1,4-diethynylbenzene moiety. Considering their identical polymer backbone structures, the side chains were found to have a strong influence on the surface morphology/nanostructure, thus playing a critical role in charge-transporting properties of the three NDI-based copolymers. Among the polymers, the one with an octyldodecyl (OD) chain at the nitrogen atoms of imide ring and a hexadecyloxy (HO) chain at the 2,5-positions of 1,4-diethynylbenzene, P(NDIOD-HO), exhibited the highest electron mobility of 0.016 cm(2)V(-1) s(-1) as compared to NDI-based copolymers with an ethylhexyl chain at the 2,5-positions of 1,4-diethynylbenzene. The enhanced charge mobility in the P(NDIOD-HO) layers is attributed to the well-aligned nano-fiber-like surface morphology and highly ordered packing structure with a dominant edge-on orientation, thus enabling efficient in-plane charge transport. Our results on the molecular structure-charge transport property relationship in these materials may provide an insight into novel design of n type conjugated polymers for applications in the organic electronics of the future.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/99298
- DOI
- 10.1021/acsami.8b01196
- ISSN
- 1944-8244
- Article Type
- Article
- Citation
- ACS Applied Materials & Interfaces, vol. 10, no. 15, page. 12921 - 12929, 2018-04
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.