Author/Authors :
Nakhmanovich، نويسنده , , G. and Epshtein، نويسنده , , O. and Gorelik، نويسنده , , V. and Poplawski، نويسنده , , J.M. and Oiknine-Schlesinger، نويسنده , , J. and Ehrenfreund، نويسنده , , E. and Eichen، نويسنده , , Y.، نويسنده ,
Abstract :
The electrooptic properties of novel bipyridine-containing PPV derivatives were found to be sensitive to the presence of sub-ppm concentration of different acids and bases. Upon exposure to ammonia (or HCl) vapors, the polymer film turns yellow (orange) and the electro- and photoluminescence peak at 580 (640) nm. Using controlled exposure, stable yellow/orange luminescent devices could be fabricated. In addition, reversible decrease (increase) of the effect of aggregation is observed in the electro- and photoinduced absorption, upon the deprotonation (protonation) process.
Keywords :
PPV derivatives , Electro- and photoinduced absorption spectroscopy , Photoluminescence , electroluminescence
