Effect of doping on energy gap of PMMA/ Cr2O3 blend Films
Rushdi I Jasim, Dr. Mushtak A Jabbar, Athraa N Jameel
PMMA and PMMA doped with Cr2O3 films with different concentration (1%, 3%, 5%), were prepared using the casting technique in order to study the effect of doping on energy gap of films. The optical properties of all films were investigated using spectrophotometric measurements of absorbance and transmittance in the wavelength range (250-800) nm, FTIR was carried out of (PMMA and PMMA/Cr2O3), with range 400-4000 cm−1. The absorption coefficient (α) was increase with doping of Cr2O3.The energy gap of indirect transition were found for all films and the energy gap (Eg) of pure about (4.8eVand 4.6eV)and the magnitude of energy gap of doped films were found to be increased with increasing the concentration of Cr2O3.