Abstract
The aim of this work was to study, the optical characteristics of two mixed solutions of poly [2-methoxy-5-(2'-ethylhexyloxy) -1, 4-phenylene vinylene] (MEH-PPV) and Poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(N, N'-diphenyl)-N, N'-di(pbutylphenyl)-1,4- diamino-benzene)] (PFO-co-DBP) conjugated polymers with zinc oxide (ZnO) nanoparticles. Benzene was used as the solvent. Different concentrations of solutions based on MEH-PPV were prepared varied from 0.50 to 3.0125 mu M. While for the PFO-coDBP the concentrations were from 1.725 to 14 mu M. The zinc oxide ZnO nanoparticles were dispersed in benzene from 1.25 mg to 10 mg. These solutions were characterized for optical characteristics such as absorption and fluorescence in the visible region 300-800 nm. Similar experiments were conducted to find the optical properties for pure PFO-coDBP, ZnO and then the blended solutions (MEH-PPV + PFO-co-DBP, and MEH-PPV + PFO-co-DBP + ZnO). A systematic study is presented to find the optimum solution concentration of MEH-PPV: PFO-co-DBP with ZnO nanoparticles. Fluorescence of the blends has increased dramatically upon adding ZnO. Maximum intensity of fluorescence was observed with three peaks at 480, 520 and 570 nm, for the blend of (MEH-PPV: PFO-co-DBP: ZnO) with concentrations 3.0125 mu M: 4 mu M:10 mg respectively. The fluorescence and absorption properties were dependent on the concentrations of solution used.