STUDY OF THE EFFECTS OF NANO-PARTICLE SIZES ON THE TRANSMITTANCE OF CdTe THIN FILM

In this, we study the optical properties of CdTe thin film as a function of the nano particle sizes on them. We use a MATLAB software program (( version 7.6.0324) we developed, for applications in the spectrum range 400-700 nm. We study the effect of partial 1 size on both the energy gap and the refractive index of CdTe thin film . The refractive index decreases with the particle size while, the energy gap increases. As consequence, the transmittance increases when nano- particle size decreases. One can obtain a high transmittance T=92.52% at lambda o=550nm when the nano- particle size is set to 2.6nm. For a nano- particle size of 2.4nm transmittance reaches T=99.9965%.