Nanostructured hybrid materials formed by cell reaction between polycarbazole and metals

摘要

Aluminum films are vacuum-evaporated onto a ClO4--doped green polycarbazole (PCz) film. The appearance of the resulting aluminum/PCz junctions drastically changes with time; the time-dependent fading of the metallic white color and green color of the PCz is observed during their storage in air, and colorless films are obtained several hours after the evaporation. Various microscopic analyses of the resultant films revealed that they consist of an undoped PCz film with a nanosized region of aluminum compounds being dispersed in it. Vibrational spectroscopy of the films before and after the hybridization shows the chemical interaction between the aluminum compounds and the carbazole ring. The electric conductivity, work function, and UV-vis absorption of the hybrid films are measured as a function of the amount of evaporated aluminum. The alternate use of indium is also reported.