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Issue 44, 2014
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Molecular stacking structure and field-effect transistor characteristics of crystalline poly(3-hexylthiophene)-block-syndiotactic polypropylene through solvent selectivity

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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

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Publication details

The article was received on 19 Apr 2014, accepted on 13 May 2014 and first published on 13 May 2014


Article type: Paper
DOI: 10.1039/C4RA03571B
Author version available: Download Author version (PDF)
Citation: RSC Adv., 2014,4, 23002-23009
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    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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