Abstract
This paper studied the influence of changing the lead iodide (PbI2), concentration in the PVA matrix through the structural, optical and electric measurements. Nanocomposite films have been defined by X-ray diffraction and FT-IR spectrometer which reveal the interaction between PVA and PbI2. The interplanar distance, particle size, and the average inter-crystalline separation were calculated. The optical properties of PbI2/PVA composites have been examined. PVA optical band gap was reduced from 5 to 3.49 in indirect transition and from 5.48 to 4.88 indirect transition to cause an increase in optical conductivity. Dielectric constant, and dielectric loss, and electrical conductivity, σ is increased with increasing PbI2 concentrations. So, the electrical conductivity σ can be controlled by the PbI2 doping percentage. PbI2/PVA showed laser power attenuation for both He-Ne and solid-state green laser beams. The results indicate that the nanocomposites are highly recommended in optoelectronic, radiation detection and many other applications.
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