No abstract

Polyvinyl alcohol (PVA) films were prepared by casting method. The optical properties was measured in the wavelength rang of (200–900) nm, by using UV-visible spectroscopy. The effect of irradiation lead to degradation on the physical properties such as absorbance, transmittance, refractive index, extinction coefficient in addition of the real and imaginary part of dielectric constant was studied. This study reveals that all these parameters affected by the increasing of them irradiation, and also found that the optical energy gap has been increased with the increasing of the irradiation. The structural properties are studied by using XRD, FTIR spectrum, and FESEM.

Gamma ray effect has been worked out on PMMA/PS blends at different concentrations. The optical constants such as the absorption coefficient, refractive index are calculated, and optical energy gap (direct/indirect) has been studied before and after irradiation. Transmittance, absorbance, and reflectance spectra of pure and blends polymers are investigated.

No abstract

The ferric oxide nanoparticles (Fe2O3) which are deposited at interface which is related to hole collecting buffer layer [poly(3,4-ethyl-enedioxythiophene): poly(styrene-sulfonate) (PEDOT: PSS)] as well as regioregular poly(3-hexyl-thiophene): Zinc oxide nanoparticles (P3HT): (ZnO) active layer have been considerable increasing the performance of solar cell. Also, the solar cell devices have been fabricated with a weight ratio of 1:0.7, 1:0.8, 1:0.9 and 1:1 of P3HT and ZnO, respectively. In addition, photo physical characteristics regarding such devices with different value of the weight ratio were examined. This work is indicating that the absorption spectrum related to blend will be broad with varying ratios that was extremely required for the devices of the organic solar cells. Furthermore, the film morphology was estimated via atomic force microscope (AFM). EQE (i.e. External quantum efficiency) and XRD patterns measures were achieved for the optimal device, while the improvement in the efficiency with regard to a device with 1:1 was more considerable compared to 1:0.90, 1:0.80 as well as 1:0.70 values of weight ratio of P3HT and ZnO. With different weight ratio values, a solar cell upon (1:1) provides PCE (i.e. Power Conversion Efficiency) of 4.1%, dissimilar to 3.92% for (1:0.9), 3.9% for (1:0.8) and 3:6% devices.