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Solubility-driven thin film structures of regioregular poly(3-hexyl thiophene) using volatile solvents

By: Hoichang Yang; Scott W. LeFevre; Chang Y. Ryu; Zhenan Bao;

2007 / American Institute of Physics

Description

Using atomic force microscopy and grazing-incidence x-ray diffraction, the authors found that the use of volatile CH2Cl2 not only offers an advantage in minimizing regioregular poly(3-hexyl thiophene) (RR P3HT) film deposition time, but also directs the desirable parallel orientation of À-À stacking planes of RR P3HT with respect to solid substrates, for both spin and drop castings. The substrate temperature effects have been investigated to support claims that the substrate-induced crystallization of RR P3HT preseeds the parallel oriented crystals prior to spin casting, when the warm CH2Cl2 solution is loaded on a cold substrate held at room temperature.

Related Topics
Solubility