Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 213, Issue 9, Pages 917-923Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201100660
Keywords
benzo[1; 2-b:4; 5-b']dithiophene; conjugated polymers; organic field-effect transistors; Stille cross-coupling reaction; tri(2-thienyl)pyridine
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Funding
- National Natural Science Foundation of China (NSFC) [21174084]
- Shanghai Municipal Government [B202, 10ZZ15]
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2,4,6-Tri(2-thienyl)pyridine is used to synthesize the new conjugated polymer PBDTTPy for OFET applications. The concept of introducing electron-deficient pyridine repeating units and meta-linked structures into a conjugated polymer to reduce its HOMO energy level and thereby increase its ambient stability is tested. The absorption spectrum of the polymer thin film displays a large bathochromic shift compared with its solution absorption spectrum. The polymer PBDTTPy shows a typical amorphous structure in the solid state. The first OFET device based on a conjugated polymer with meta-linked trithienylpyridine units is reported. PBDTTPy exhibits p-type transport under ambient conditions in a bottom-gate, top-contact OFET device with a mobility of 2.4 x 10-4 cm2 V-1 s-1.
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