Pure Polyvinyl Alcohol (PVA) film and PVA polymer film/ Rhodamine 6G(Rh6G) dye film in different volume ratios of (6, 12,18, 24 and 30) ml of Rh6G were prepared via casting method. The addition of Magnesium Oxide (MgO) and Aluminium Oxide (Al2O3) nanoparticles as a filler to the polymer matrix. The results demonstrated that there was a 10 nm red shift in the absorption spectra of Rh6G in PVA/ Rh6G polymer matrix due to add doping ratio of Rh6G dye solution to the transparent PVA matrix. Also, there was a 5 nm red shift in polymer matrix filled with Al2O3 NPs; this means that Al2O3 NPs absorb the water and that consequently enhance the optical properties of polymer matrix. The intensity of Rh6G doped PVA polymer film was seen to be enhanced when adding MgO NPs or Al2O3 NPs, noted that intensity of adding Al2O3 NPs more than it when adding MgO NP. The electronic transition was found to be π→π*.

Polyvinyl Alcohol (PVA) polymer/ Acridine Orange (AO) dye films prepared via casting technique at room temperature. The effect of adding (Acridine Orange (AO) dye solution, Magnesium Oxide (MgO), and Aluminum Oxide (Al2O3) NPs) to the PVA polymer matrix were studied on the absorption spectra. The effect of AO addition on the absorption spectrum of PVA film is occurrence blue shift (5nm) from 280nm to 275 nm in the PVA and red shift (10nm) from 490nm to be 500 nm for AO maximum absorbance wavelength. The absorbance of AO dye decreases when adding PVA, but increases When the volume ratio of AO dye solution is increased to 0.49 for 18ml, the volume ratio of AO dye solution decreases for 24- and 30-ml volume ratios. Adding NPs led to enhancing the photophysical properties of polymer composite, noted that absorbance of adding alumina nanoparticles more than it is in the case of adding magnesia nanoparticles. Also, there is a 10 nm red shift in AO and a 5 nm blue shift in AO when they are added to the polymer matrix filled with MgO and Al2O3 NPs.

Energy transfer in a hybrid mixture of Rhodamine 6G (Rh6G) dye laser as a donor and nanoparticles (NPs) as an acceptor were studied. The absorption spectra of 1×10-5M of Rh6G in Distilled Water show increase in the intensity when adding NPs. noticeable, improve the spectra when adding Aluminum Oxide Al2O3 NPs. Adding NPs quench the fluorescence spectra of Rh6G due to Förster resonance energy transfer (FRET). The efficiency of energy transfer increase with increasing concentration of NPs. Best value of efficiency of energy transfer found in Rh6G/ Magnesium Oxide MgO NPs. Strong relationship was in Rh6G/ Al2O3 NPs.