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It prepared a polymer and polymer gel of a liquid crystalline (LC) semiconductor having a 2-phenylnaphthalene moiety and studied their charge carrier transport properties by the time-of-flight technique. It is found that polyacrylate having the mesogenic core moiety of 2-phenylnaphtalene (PNP-acrylate) exhibited a comparable mobility of 10 -4 cm2/Vs in smectic A phase to those in smectic A (SmA) phase of small molecular liquid crystals with the same core moiety, e.g., 6-(4’-octylphenyl)- 2-dodecyloxynaphthalene (8-PNP-O12), and an enhanced mobility up to 10 -3cm2/Vs in the LC-glassy phase at room temperature, when mixed with a small amount of 8-PNP-O12. On the other hand, the polymer gel consisting of 20 wt%-hexamethylenediacrylate (HDA)-based cross-linked polymer and 8-PNP-O12 exhibited no degraded mobility when cross-linked at the mesophase. These results indicate that the polymer and polymer composite of liquid crystalline semiconductors provide us with an easy way to realize a quality organic semiconductor thin film for the immediate device applications.
It was prepared a polymer and polymer gel of a liquid crystalline (LC) semiconductor having a 2-phenylnaphthalene moiety and studied their charge carrier transport properties by the time-of-flight technique. It is found that polyacrylate having the mesogenic core moiety of 2- phenylnaphtalene (PNP-acrylate) exhibited a comparable mobility of 10 -4 cm2 / Vs in smectic A phase to those in smectic A (SmA) phase of small molecular liquid crystals with the same core moiety, eg, 6- (4’-octylphenyl ) - 2-dodecyloxynaphthalene (8-PNP-O12), and an enhanced mobility up to 10 -3 cm 2 / Vs in the LC-glassy phase at room temperature, when mixed with a small amount of 8-PNP-O12. hand, the polymer gel consisting of 20 wt% -hexamethylenediacrylate (HDA) -based cross-linked polymer and 8-PNP-O12 no degraded mobility when cross-linked at the mesophase. These results indicate that the polymer and polymer composite of liquid crystalline semiconductors provide us with an easy way to realize aq uality organic semiconductor thin film for the immediate device applications.