Study Optical Properties of PVP Films Doped with Nanoparticles Ag by Using Nd:YAG Laser
Keywords:
polyvinylpyrrolidone (PVP), doping, structural, optical properties, optical energy gap, concentration, nanoparticle silver.Abstract
The doped PVP with nanoparticle silver metal using Nd:YAG laser ablation solute in ethanol. The spin-coating techniques with concentrations (0,3,5,7,9,11wt%) are achieved by (20 ml ) ethanol using magnetic stirrer The solution doped with (1ml) of collide nanosilver particle.. An increment of UV-Vis absorption has produced maximum peak absorbance spectra at about 0.7 to 0.85 values with a high shifting after doping with nanoparticle silver. The indirect Egopt of pure and doped PVP films were found to be decreased about 2.56,2.54,2.52.2.50,2.47eV, and 4.18,4.14,4.15,4.16,4.12,4.17 eV for indirect allowed transitions as increase concentration respectively, whereas the indirect forbidden band gaps were determined as 2.73, 2.67, 2.66, 2.65, 2.63 eV and 4.175,4.18,4.15,4.158,4.1,4.165 eV with increase concentration after doping respectively. The prepared samples appeared near band edge peak absorption at about 350 nm.
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