Photoactive and Electroactive Amorphous Molecular Material - Morphology, Structures, and Hole Transport-Properties of Tris(4-(2-Thienyl)Phenyl)Amine

Sakai J; Kageyama H; Nomura S; Nakano H; Shirota Y

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.296, 445-463, 1997

DOI10.1080/10587259708032339 Export Citation

Photoactive and Electroactive Amorphous Molecular Material - Morphology, Structures, and Hole Transport-Properties of Tris(4-(2-Thienyl)Phenyl)Amine

Sakai J, Kageyama H, Nomura S, Nakano H, Shirota Y

For the purpose of developing photo-and electro-active amorphous molecular materials, tris[4-(2-thienyl)phenyl] amine (TTPA) was synthesized and its molecular and crystal structures, morphological changes, and molecular and hole-transport properties were investigated. TTPA was found to readily form an amorphous glass with a glass-transition temperature of 70 degrees C, as characterized by differential scanning calorimetry and X-ray diffraction. In addition to the formation of a glass, TTPA was found to exhibit polymorphism. The TTPA glass exhibited a hole drift mobility of 6.4 x 10(-4) cm(2)V(-1)s(-1) at an electric field of 1.0 x 10(5) Vcm(-1) at 193 K.

Keywords:METHYL-SUBSTITUTED DERIVATIVES;ORGANIC ELECTROLUMINESCENT DEVICES;STARBURST MOLECULES;CHARGE-TRANSPORT;ARYLKETONE HYDRAZONES;ABSORPTION-SPECTRA;GLASS-TRANSITION;DOPED POLYMERS;1;3;5-TRIS(DIPHENYLAMINO)BENZENE;POLYCARBONATE