@Article{CL.2023.2011.759,
AUTHOR = {M. N. Abdel-Salam, N. Sabry, E. S. Yousef, E. R. Shaaban},
TITLE = {Effect of Cu ratios dopant on ZnSe thin films structural and optical properties},
JOURNAL = {Chalcogenide Letters},
VOLUME = {20},
YEAR = {2023},
NUMBER = {11},
PAGES = {759--777},
URL = {http://www.techscience.com/CL/v20n11/65099},
ISSN = {1584-8663},
ABSTRACT = {This study focused to prepare poly-crystalline (ZnSe)<sub>1-x</sub>Cu<sub>x</sub> thin films, where x values 
vary from 0 to 0.1 %. the effect of Cu ratios dopant on structural, phases and optical 
properties has been investigated. As prepared thin films were deposited onto a cleaning 
glass substrate under high vacuum conditions (10<sup>-7</sup>
 mbr) at room temperature using the “ 
evaporation technique”. The analysis results according to data of the X-ray diffraction 
technique of all films refer to the growth polycrystalline with hexagonal wurtzite structure 
of Zn-Se with no presence of any further phases. The changes in numerous parameters 
such as volume of the unit cell, atomic packing factor, dislocation density, lattice constant 
and bond length with the Cu ratio were estimated and described. As well, the crystallite 
sizes,D, the lattice micro-strain, ε and dislocation density, δ have been calculated the results 
evidence that the micro-structural parameters enhancement with increment Cu atoms. On 
the other hand, the optical parameters of the as-synthesized films (ZnSe)<sub>1-x</sub>Cu<sub>x</sub> (0 ≤ x ≤ 
0.1) were performed utilizing “UV–V is spectro -photometer” with a wavelength range of 
300 to 2400 nm. The results show that as the Cu ratio increases, the absorption edge shifts 
to a higher wavelength and the optical band gap, E<sub>g</sub>
<sup>opt</sup>
 decreases from 2.63 eV to 2.52 eV. 
Finally, the behaviour of the optical constant parameters as real,ε<sub>r</sub>/ imaginary, ε<sub>i</sub> parts, 
dissipation factor, tan δ, volume/surface energy loss functions and dispersion parameters 
were shown to depend on the variation of the Cu ratio and wavelengths. },
DOI = {10.15251/CL.2023.2011.759}
}