Issue 44, 2014

Molecular stacking structure and field-effect transistor characteristics of crystalline poly(3-hexylthiophene)-block-syndiotactic polypropylene through solvent selectivity

Abstract

We investigate the molecular packing structures, morphologies and field-effect characteristics of the crystalline–crystalline poly(3-hexylthiophene)-block-syndiotactic polypropylene block copolymers (P3HT-b-sPP) using different solvent mixtures of chloroform–cyclohexane (CF–CH). For the P3HT-b-sPP with a shorter sPP segment length, the increase of CH solvent content led to the P3HT domain with highly crystalline nanofibrillar networks and thus improved the charge transporting characteristics. For the P3HT-b-sPPs with a longer sPP segment length, well-defined microstructure and device characteristics were only observed at the 70 vol% CF content. Furthermore, the self-encapsulation of the insulating sPP blocks effectively improved the air stability of the P3HT-b-sPP field transistor devices. This work highlights the significance of solvent selectivity and rod/coil block ratios on the molecular packing and the organic field-effect transistor performances.

Graphical abstract: Molecular stacking structure and field-effect transistor characteristics of crystalline poly(3-hexylthiophene)-block-syndiotactic polypropylene through solvent selectivity

Supplementary files

Article information

Article type
Paper
Submitted
19 Apr 2014
Accepted
13 May 2014
First published
13 May 2014

RSC Adv., 2014,4, 23002-23009

Author version available

Molecular stacking structure and field-effect transistor characteristics of crystalline poly(3-hexylthiophene)-block-syndiotactic polypropylene through solvent selectivity

C. Lo, C. Lin, J. Lee, S. Tung, J. Tsai and W. Chen, RSC Adv., 2014, 4, 23002 DOI: 10.1039/C4RA03571B

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