EMISSION CHARACTERISTICS OF POLY[(TETRAALKYLDISILANYLENE)-P-OLIGOPHENYLENE]S

Optical absorption spectrum, photoluminescence (PL) and electrolumines cence (EL) in poly[(tetraalkyldisilanylene)-p-oligophenylene]s (PDSiOP ) are found to be dependent on the length of the oligophenylene but no t on the length of the short alkyl substituents such as methyl and eth yl substituents. Spectral narrowing of the blue PL was observed in pol y[(tetraalkyldisilanylene)-p-oligophenylene]s upon intense optical exc itation due to stimulated emission. PL quenching and photoconductivity (PC) enhancement upon C-60 doping are commonly observed in these poly mers. These characteristics were explained taking the important role o f oligophenylene units in the main chain into consideration.