Abstract
In this research, pure and 4%, Mn-doped thin films of cadmium sulfide (CdS) were synthesized using a 2-hour hydrothermal process. The effect of adding the dopant concentration on thesamples' structural, morphological, and optical characteristics were investigated. The ultraviolet-visible-NIR spectrophotometer was used to investigate the optical properties. UV-Vis experiments lowered the optical bandgap with an add Mn percentage. Their optical bandgap was 2.38 eV for undoped thin films and 1.81 eV for 4% doped Mn-CdS thin films. UV-Vis spectroscopy data are in agreement with PL. FE-SEM imaging revealed morphological changes caused by the inclusion of Mn in CdS thin films. FE-SEM displays images of undopedCdS,which appear to be Nanoparticles. Morphology of the thin films has shown that the average grain size increases by the agglomeration of Nano-grains, which become clusters of particles after Mn+2incorporation. In addition, The XRD pattern revealed that prepared samples H (002)/C (111) as hexagonal and cube phases have a preferential orientation. The increase in the main diffraction peak (002) intensity with increasing Mn concentration revealed the substitution of Mn+2 with Cd+2 in the lattice. The crystallite size increased from10.74 to 11.67 nm with an Mn percentage.
Highlights
The emergence of efficient nanostructure synthesis and characterization has opened a new frontier in the field research and advancement of novel products Due to their small size; they are often perfect crystals free of defects or internal strain
Structure Properties The XRD spectra of undoped and 4% Mn-doped cadmium sulfide (CdS) thin films are displayed deposited on a glass substrate
The results confirm the presence of CdS thin film with hexagonal wurtzite and cubic structure of CdS, which are identical to the peaks of the standard datasheet (JCPDS No 42-1411)
Summary
The emergence of efficient nanostructure synthesis and characterization has opened a new frontier in the field research and advancement of novel products Due to their small size; they are often perfect crystals free of defects or internal strain. The II-VI group of nanocrystalline semiconductors is the most studied since it is relatively simple to synthesize and can often be prepared as particulates or in thin films[1]. Due to their multidimensional usefulness in a wide range of optoelectronic devices, chalcogenides are gaining a lot of interest[2]. As previously mentioned, CdS thin films have been developed using a variety of techniques Some of these methods are complex and/or expensive, and hydrothermal synthesis has been proved to be a relatively simple method due to its simple experimental setup and low cost [15]. The influence of Mn-content on structural, optical, and morphological properties of CdS thin film was studied in details
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