Abstract

The influence of the solvent nature on optical properties of poly[2-methoxy-5-3,7-
dimethyloctyloxy-1,4-phenylenevinylene] (MDMO-PPV)/Coumarine 500 (C500) have been
investigated. In addition, the amplified spontaneous emission (ASE) from MDMO-PPV and efficient
energy transfer between the MDMO-PPV and C500 has been verified. The MDMO-PPV was dissolved
in aromatic and nonaromatic solvents, while the solution blending method was employed to prepare
the MDMO-PPV:C500 hybrid. The quantum yield of the MDMO-PPV was found to increase with the

The effect of TiO2 nanoparticle (NP) content on the improvement of poly(9,90-di-noctylfluorenyl-
2,7-diyl) (PFO)/Fluorol 7GA organic light emitting diode (OLED) performance is
demonstrated here. The PFO/Fluorol 7GA blend with specific ratios of TiO2 NPs was prepared via
a solution blending method before being spin-coated onto an indium tin oxide (ITO) substrate to
act as an emissive layer in OLEDs. A thin aluminum layer as top electrode was deposited onto the
emissive layer using the electron beam chamber. Improvement electron injection from the cathode