Photoluminescence Study Of Poly (9,9-Di-N-Octylfluorenyl-2,7-Diyl)/Flourol 7GA/Poly2-Methoxy-5-(2-Ethylhexyloxy)-1,4-Phenylenevinylene Blends

摘要

The aim of this work is to study the photoluminescence characteristics of Poly (9,9-di-n-octylfluorenyl-2,7-diyl) (PFO)/Flourol 7GA (F7GA)/Poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) blends for potential application as white OLEDs. In this work the PFO/F7GA acted as donor while the MEH-PPV acted as acceptor. The F7GA content was fixed at 0.5 wt% of PFO while concentration of MEH-PPV was varied between 0 and 7 wt%. All three polymers were mixed using solution blending method followed by deposition onto glass substrate using spin coating technique. It was observed that the intensity of PFO/F7GA emissions systematically reduced before completely quenched at the highest MEH-PPV content. In contrast, MEH-PPV recorded enhanced PL emission and achieved maximum intensity at the highest wt%. This observation indicates the efficient energy transfer has taken place, suggesting the shortening of Forster radius between the donor and acceptor.