study on photo-physical properties of semi-conducting polymers with different feeding manners: a case study of meh-ppv

The solvent-induced chain aggregation determines the charge transport properties for many conjugated polymers (cps). to study the effect of the ternary solvent mixture on the photophysical properties of poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (meh-ppv), three solvents with different hansen parameters was used for dissolving this polymer. the meh-ppv as a well-known conjugated polymer was dissolved in a ternary solvent system by the dropwise and continuous adding route. in this work, the influence of solvent mixtures on the optical properties was investigated by ultraviolet-visible (uv-vis) and photoluminescence (pl) spectroscopy.