In:
Pure and Applied Chemistry, Walter de Gruyter GmbH, Vol. 86, No. 8 ( 2014-08-20), p. 1293-1302
Abstract:
A series of thienothiophene-benzotriazole-based semicrystalline copolymers, PTTBTz , PTTBTz-F , and PTTBTz-OR , were synthesized by considering chain linearity, planarity and inter-chain packing by virtue of non-covalent attractive interaction. Fluorine and alkoxy substituents were introduced to modulate the intra- and inter-chain coulombic interactions and crystalline ordering. The fluorine and alkoxy-substituted PTTBTz-F and PTTBTz-OR showed pronounced inter-chain packing with edge-on orientation confirmed by UV-vis absorption and X-ray diffraction measurements. The well-resolved diffraction patterns were obtained for PTTBTz-F and PTTBTz-OR , showing (100)∼(500) inter-lamellar scattering peaks (d-spacing, 17∼18 Å) in the out-of-plane direction and a π-π stacking peak (d-spacing, 3.5∼4.1 Å) in the in-plane direction. Organic field effect transistor (OFET) devices were fabricated with a bottom gate and top contact geometry. PTTBTz-F ( μ h = 4.49 × 10 –2 cm 2 V –1 s –1 , on/off ratio = 1.13 × 10 7 ) and PTTBTz-OR ( μ h = 8.39 × 10 –3 cm 2 V –1 s –1 , on/off ratio = 2.98 × 10 4 ) showed nearly 3 and 2 orders of magnitude higher hole mobility upon annealing at 305 and 260 °C, with compared to the unsubstituted PTTBTz .
Type of Medium:
Online Resource
ISSN:
1365-3075
,
0033-4545
DOI:
10.1515/pac-2014-0205
Language:
Unknown
Publisher:
Walter de Gruyter GmbH
Publication Date:
2014
detail.hit.zdb_id:
2022101-0
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