標題: Synthesis of diketopyrrolopyrrole based conjugated polymers containing thieno[3,2-b]thiophene flanking groups for high performance thin film transistors
作者: Peng, Shih-Hao
Tu, Wei-Yi
Gollavelli, Ganesh
Hsu, Chain-Shu
應用化學系
Department of Applied Chemistry
公開日期: 14-Jun-2017
摘要: New donor-acceptor (D-A) conjugate polymers based on 3,6-bis(2-bromothieno-[3,2-b] thiophen-5-yl)2,5- bis(2-octyldodecyl) pyrrolo[3,4-c]-pyrrole-1,4-(2H, 5H)-dione (Br-TTDPP) combined with three different electron-donating monomers bithiophene (BT), di(2-thienyl) ethene (TVT), and di(selenophene2- yl) ethene (SVS) were synthesized. The optical band gap, electrochemical properties and organic fieldeffect transistor (OFET) device performance of the TTDPP-based polymers were systematically investigated. X-ray diffraction (XRD) was used to evaluate the molecular packing of the TTDPP-based polymers. Among three polymers, TTDPP-SVS showed the smallest d-spacing and the largest distance of 0.372 for pi-pi stacking. In particular, an OTFT having a TTDPP-SVS active layer showed the highest hole mobility of 0.196 cm(2) V-1 s(-1), the lowest threshold voltage down to -3.6 V, and the highest Ion/Ioff ratio of 6.5 x 10(4). This indicates that p-extended SVS significantly improves charge transport properties.
URI: http://dx.doi.org/10.1039/c7py00402h
http://hdl.handle.net/11536/145599
ISSN: 1759-9954
DOI: 10.1039/c7py00402h
期刊: POLYMER CHEMISTRY
Volume: 8
起始頁: 3431
結束頁: 3437
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