تجاوز إلى المحتوى الرئيسي

Optical and structure properties of CdTe/CdS films under influence of both CdCl2 heat treatment and (O2+ Ar) atmosphere

Author name : Mohamed Fathy Hassanen Ahmad
Publication Date : 2020-06-08
Journal Name : Applied Physics A

Abstract

Thin flms of CdTe/CdS were prepared using the thermal evaporation technique with pressure 2×10−5 mbar on substrate from
glass. The thickness of CdCl2 layer around 150 nm was deposited making as-deposited CdTe/CdS flms. The flms covered
by cadmium chloride (CdCl2) layer were annealed in atmosphere of (O2+Ar) at diferent temperatures of 400 °C, 450 °C
and 480 °C for 15 min. The efect of CdCl2 as a top layer on morphological, structural and optical properties was studied, and
the results were compared with as-deposited flms and also with (O2+Ar) annealing process. The refractive index in whole
wavelength and flm thickness was estimated by Cauchy dispersion relation and Swanepoel’s envelope method, respectively.
Furthermore, many optical parameters such as transmittance, absorbance, refectance, and optical band gap, Urbach energy,
flm thickness, electronic polarizability, lattice dielectric constant were calculated also in this study. The heat treatment of
our flms with depositing CdCl2 layer in (O2+Ar) fow lowered the energy gap which led CdTe/CdS flms to be a candidate
to work in thin-flm solar cells as an absorber layer.

Keywords

X-ray difraction; Thermal evaporation deposition processes; Chloride vapor phase epitaxy; Solar cell; Semiconducting II-VI materials

Publication Link

https://doi.org/10.1007/s00339-020-03688-y

Block_researches_list_suggestions

Suggestions to read

HIDS-IoMT: A Deep Learning-Based Intelligent Intrusion Detection System for the Internet of Medical Things
Ahlem . Harchy Ep Berguiga
Generalized first approximation Matsumoto metric
AMR SOLIMAN MAHMOUD HASSAN
Structure–Performance Relationship of Novel Azo-Salicylaldehyde Disperse Dyes: Dyeing Optimization and Theoretical Insights
EBTSAM KHALEFAH H ALENEZY
“Synthesis and Characterization of SnO₂/α-Fe₂O₃, In₂O₃/α-Fe₂O₃, and ZnO/α-Fe₂O₃ Thin Films: Photocatalytic and Antibacterial Applications”
Asma Arfaoui
تواصل معنا