Journal Name:
Results in Physics
Volume:
7
Issue:
2
Pages From:
4168
To:
4173
Date:
Thursday, October 19, 2017
Abstract:
In the current study, we attempted to explore the effects of the Indium nanosandwiching on the mechanical
and optical properties of the physically evaporated ZnSe thin films by means of X-ray diffractions and
ultraviolet spectrophotometry techniques. While the thickness of each layer of ZnSe was fixed at 1.0 lm,
the thickness of the nanosandwiched Indium thin films was varied in the range of 25–100 nm. It was
observed that the as grown ZnSe films exhibits cubic and hexagonal nature of crystallization as those
of the ZnSe powders before the film deposition. The cubic phases weighs 70% of the structure. The analysis
of this phases revealed that there is a systematic variation process presented by the decreasing of;
the lattice constant, compressing strain, stress, stacking faults and dislocation intensity and increasing
grain size resulted from increasing the Indium layer thickness in the range of 50–100 nm. In addition,
the nanosandwiching of Indium between two layers of ZnSe is observed to enhance the absorbability
of the ZnSe. Particularly, at incident photon energy of 2.38 eV the absorbability of the ZnSe films which
are sandwiched with 100 nm Indium is increased by 13.8 times. Moreover, increasing the thickness of the
Indium layer shrinks the optical energy band gap. These systematic variations in mechanical and optical
properties are assigned to the better recrystallization process that is associated with Indium insertion
which in turn allows total internal energy redistribution in the ZnSe films through the enlargement of
grains.