Citation: Li-guo Chai, Hai-xin Zhou, Xiao-li Sun, Hui-hui Lia, Shou-ke Yan, Xiao-qiu Yang. Structure of Friction-transferred Highly Oriented Poly(3-hexylthiophene) Thin Films[J]. Chinese Journal of Polymer Science, ;2016, 34(4): 513-522. doi: 10.1007/s10118-016-1770-z shu

Structure of Friction-transferred Highly Oriented Poly(3-hexylthiophene) Thin Films

1.
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
2.
Basic Research Service, MOST, Beijing 100862, China

Corresponding author: Shou-ke Yan,
Received Date: 27 October 2015
Revised Date: 21 November 2015

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 51221002 and 21434002).

Oriented thin films of P3HT were obtained by a friction-transfer technique. The morphology and structure of the film were studied by means of optical microscopy, atomic force microscopy and transmission electron microscopy. Optical microscopy observation indicates that large size well-ordered P3HT thin films can be produced by a friction-transfer technique. Highly ordered lamellae were observed in P3HT friction-transferred films by electron microscopy. Electron diffraction results confirm the existence of high orientation with the a- and c-axes of P3HT crystals aligned in the film plane while the c-axis parallel to the friction-transfer direction. The atomic force microscopy observation of the as-prepared P3HT thin film shows, however, a featureless top surface morphology, indicating the structure inhomogeneity of the obtained film. To get highly oriented P3HT thin films with homogenous structure, high temperature annealing, solvent vapor annealing and self-seeding recrystallization of the friction-transferred film were performed. It is confirmed that solvent vapor annealing and self-seeding recrystallization methods are efficient in improving the surface morphology and structure of the frictiontransferred P3HT thin film. Highly oriented P3HT films with unique structure can be obtained through friction-transfer with subsequent solvent vapor annealing and self-seeding recrystallization.
- Poly(3-hexylthiophene),
- Friction-transfer,
- Thin film,
- Orientation
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