Effect of Cd²⁺Molar Concentration in Cd_xZn_(1−x)S Thin Film by Chemical Bath Deposition Technique Using Alternative Sulfur Precursor

Abstract

Ternary semiconductor CdxZn(1−x)S thin films are prepared by chemical bath deposition (CBD) using N-methyl thiourea as an alternative sulfur precursor. Molar concentration of CdSO4 has been varied from 0.01 M to 0.09 M during the fabrication process of CdxZn(1−x)S thin film. Effect of variation in Cd2+ molar concentration on morphological, structural and opto-electrical properties of CdxZn(1−x)S thin film has been investigated. As grown films are found less crystalline and structural analysis suggests that CdxZn(1−x)S phase changes with the increase of Cd2+ molar concentration. SEM images reveals that all the films exhibit granules-like morphology. Raman peak indicates that higher concentration of CdSO4 precursor forms more CdS in the CdxZn(1−x)S. Bandgaps of CdxZn(1−x)S thin films are found to be ranged from 2.44 eV to 2.95 eV for different Cd2+ molar concentrations in the CdxZn(1−x)S thin films. Resistivity and carrier mobility of as grown CdxZn(1−x)S films ranged from 14.2 × 103 ohm-cm to 2.25 × 103 ohm-cm and 4.31 cm2 (V s)−1 to 9.42 cm2 (V s)−1, respectively. As all these findings affirms the credibility of using N-methyl thiourea as an alternative sulfur precursor for the development of CdxZn(1−x)S thin film by CBD process.

Effect of CuCl2 treatment on RF magnetron-sputtered CdSe thin films for potential photovoltaic usage

“…Usually, thin films with larger grain size demonstrated increased level of surface roughness. 41,42) We observed that 0.1 M CuCl 2 -treated CdSe film had the largest grain size amongst all. A similar trend was observed with regard to film roughness.…”

Insights into the Operation of Noble‐Metal‐Free Cocatalyst 1T‐WS2‐Decorated Zn0.5Cd0.5S for Enhanced Photocatalytic Hydrogen Evolution

“…The vibration peaks of Zn 0.5 Cd 0.5 S at 230 cm À 1 , 330 cm À 1 , and 640 cm À 1 corresponded to A 1 /E 1 LO, 1LO and 2LO phonon modes, respectively. [36,37] Except for the vibration peak corresponding to Zn 0.5 Cd 0.5 S, 1T-WS 2 /Zn 0.5 Cd 0.5 S series samples had no other obvious peak, because the Raman characteristic peak strength of 1T-WS 2 was relatively weak and the mass fraction of 1T-WS 2 was low. The results above illustrate that 1T-WS 2 rather than 2H-WS 2 and 1T-WS 2 /Zn 0.5 Cd 0.5 S were successfully synthesized.…”

“…The lattice fringes with 0.32 nm spacing matched with (002) plane of Zn 0.5 Cd 0.5 S, and those of 0.95 nm belonged to the (002) plane of 1T-WS 2 , which were broader than those of 2H-WS 2 (0.62 nm) as reported. [36,37] The distribution of W, Zn, Cd, S elements on the surface of 7.5 %1T-WS 2 /Zn 0.5 Cd 0.5 S was further characterized by elemental mapping analyses (Figure 2d-i): The elements are evenly distributed and the proportion of detected elements is close to the 0.5 : 0.5 : 1 ratio in 1T-WS 2 /Zn 0.5 Cd 0.5 S composites; more importantly, 1T-WS 2 nanosheets acted as a good carrier for Zn 0.5 Cd 0.5 S nanoparticles. The close interaction between the nanoparticles and the nanosheets was conducive to increasing the surface contact area of the main catalyst and co-catalyst and shortening the transfer distance of photogenerated charges, thus promoting the migration efficiency of charges at the interface.…”

Optimization of the properties of CdxZn1-xS films prepared by chemical bath deposition

“…The effect on the properties of Cd x Zn 1-x S films at different CdCl 2 concentrations (0.1-0.9M) and different Zn 2+ concentrations was investigated using bivariate by Zellagui et al [14]. Nurhafiza [15] studied the effect on the photovoltaic properties of Cd x Zn 1-x S films at different concentrations of CdSO 4 (0.01-0.09M). However, the Cd 2+ concentration used by the above researchers to conduct their experiments was high and still posed a significant environmental hazard.…”