Abstract
The polymer blend effect in the fabrication of uniaxially oriented thin films of a mesogenic phthalocyanine, 1,4,8,11,15,18,22,25-octahexylphthalocyanine (C6PcH2), by contact freezing was studied. Contact freezing was induced by thermal stimulation to a supercooled liquid crystal state of the mixture of C6PcH2 and poly(3-hexylthiophene) (P3HT). With the blending of P3HT with C6PcH2 at an appropriate blend ratio, the cracks observed in a pure C6PcH2 film disappeared while maintaining the uniaxial alignment of C6PcH2. The polymer blend effect was discussed by taking the anisotropic optical absorption and molecular stacking structure in the thin films into consideration.
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