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

Abstract

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 l 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 λo=550nm when the nano- particle size is set to 2.6nm . For a nano- particle size of 2.4nm transmittance reaches T=99.9965% .