Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 20, Issue 50, Pages 16672-16679Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201404508
Keywords
donor-acceptor systems; fused-ring systems; molecular electronics; semiconductors; thin films
Categories
Funding
- Swiss National Science Foundation [200021-147143]
- ERC [StG 2012-306826 e-GAMES]
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN)
- DGI (Spain) [CTQ2013-40480-R, TEC2011-27859-C02-01, MAT2012-30924]
- Generalitat de Catalunya [2014-SGR-17]
- National Natural Science Foundation of China [21175077]
- Taishan Scholar Program of Shandong Province
- ICREA Funding Source: Custom
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Three new organic semiconductors, in which either two methoxy units are directly linked to a dibenzotetrathiafulvalene (DB-TTF) central core and a 2,1,3-chalcogendiazole is fused on the one side, or four methoxy groups are linked to the DB-TTF, have been synthesised as active materials for organic field-effect transistors (OFETs). Their electrochemical behaviour, electronic absorption and fluorescence emission as well as photoinduced intramolecular charge transfer were studied. The electron-withdrawing 2,1,3-chalcogendiazole unit significantly affects the electronic properties of these semiconductors, lowering both the HOMO and LUMO energy levels and hence increasing the stability of the semiconducting material. The solution-processed single-crystal transistors exhibit high performance with a hole mobility up to 0.04 cm(2) V-1 s(-1) as well as good ambient stability.
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