What question did this study set out to answer?

The research aims to investigate how varying immersion times in CdTe nanoparticle suspension influences the crystallinity and optical properties of thin films.

March 2, 2026Open Access

Effect of Immersion Time on Crystallinity and Optical Properties of CdTe Thin Films

Puntos clave

The research aims to investigate how varying immersion times in CdTe nanoparticle suspension influences the crystallinity and optical properties of thin films.
Utilized pulsed laser ablation to prepare CdTe nanoparticles.
Deposited thin films with thicknesses ranging from 300 to 420 nm.
Conducted X-ray diffraction (XRD) analysis to assess crystallinity.
Applied atomic force microscopy (AFM) to evaluate surface characteristics and roughness.
Employed Fourier transform infrared spectroscopy (FTIR) to confirm the formation of the CdTe structure.
Increased immersion time from 1 to 4 hours enhanced crystallinity and crystallite size from 19 to 21.6 nm.
AFM showed increases in particle diameter and surface roughness with longer deposition times.
Optical absorbance improved with changes in films, narrowing the energy gap from 2.82 to 2.62 eV.

Resumen

This study examined the influence of immersion periods in nanoparticles suspension of cadmium telluride (CdTe) prepared by pulsed laser ablation on the structural and optical properties of deposited thin films with a thickness range of 300 to 420 nm. X-ray diffraction (XRD) showed a polycrystalline structure with enhanced crystallinity and an increase in crystallite size from 19 to 21.6 nm with increasing immersion time from 1 to 4 h. Atomic force microscopy (AFM) showed increases in particle diameter and surface roughness with increasing deposition time. These changes were linked with the development of optical absorbance of the deposited films; in addition, the energy gap narrowed from 2.82 to 2.62 eV. Fourier transform infrared spectroscopy (FTIR) confirms the formation of the CdTe structure. These variations make the thin films more suitable for various applications.

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