Abstract

Single crystals of rubrene were grown by slow cooling of solutions in various solvents. Hexagonal single crystals were obtained from p-xylene, whereas parallelogram-shaped crystals were grown from aniline. Both types of crystal were obtained from propan-1-ol. Single-crystal X-ray diffraction analyses showed that the hexagonal and parallelogram-shaped crystals belonged to the orthorhombic system and the triclinic system, respectively. The triclinic crystals showed much poorer carrier mobilities than did the orthorhombic crystals.

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