Air-stable Cd0.23Zn0.77Te nanostructure thin films

Abstract

Air-stable CdZnTe nanostructure thin films were synthesized by inert gas condensation technique under constant preparation conditions of Argon gas flow, deposition rate and substrate temperature 300 K. The CdZnTe nanostructure thin films were deposited on freshly cleaned glass substrates. The film thickness has been raised from 20 to 70 nm. The films exhibited nanocrystalline single phase cubic structure as indicated by grazing incident in-plane X-ray diffraction patterns and ensured by HRTEM diffraction patterns. The average particle size of examined films was increased from 5.6 to 10.6 nm by raising thin film thickness as determined from HRTEM images. The average particle size of examined film was measured by HRTEM after 230 day aging and shows a relative stability in the particle size. The optical transmission, reflection and absorption spectra were influenced by the increasing of the particle size P s . The optical band gap E g decreased from 3.24 to 3.05 eV as average particle size enlarged from 5.6 to 10.6 nm. Higher values of absorption coefficient spectra and refractive indices have been observed for films of higher particle size. Relative stability of optical properties has been detected for aged film. The d.c. electrical conductivity behavior at different temperatures was tuned by changing the particle size of examined nanocrystalline films. The activation energy values are in the range 0.67-0.77 eV regardless the change in particle size.

Tuning structural, electrical, linear, and nonlinear optical properties of cadmium zinc telluride quantum dot thin films

“…In this case, the enhancement in electrical conductivity is attributed to the formation of nanosized particles according to the core-shell model [61]. This result was also confirmed by the previous report of El Zawawi and Mahdy [62] for another nanostructured thin film stoichiometry (Cd 0.23 Zn 0.77 Te).…”

Mechanical properties of CdZnTe nanowires under uniaxial stretching and compression: A molecular dynamics simulation study

“…Furthermore, nanotwinned CdZnTe which shows ultrahigh hardness and high ductility was fabricated using quasi-static plastic deformation under nanoindentation at room temperature [10]. Recently, air-stable Cd 0.23 Zn 0.77 Te nanostructure thin films were synthesized by inert gas condensation technique to study the effect of the particle size on the controlling the structural, optical and electronic properties [11]. The optical properties of ternary ZnCdTe nanorods between about 20-40 and 30-100 nm, and nanoparticles from about 3.8 nm to 5.4 nm in diameter have been investigated by photoluminescence spectroscopy with different refluxing times [12].…”