Abstract
Development of chemical bath deposited (CBD) CdS to steadily support the electrodeposited (ED) CdTe, by changing the volume of NH4OH, a pH adjuster, in the CBD bath is reported here. The optimal volume of NH4OH, which is the controlling parameter of interest, was identified based on the optical, electrical, structural, and morphological properties of the CdS developed. The sample developed exhibits the band gap energy of 2.32 eV with light transmittance >80% (500–900 nm). The photo-electrochemical cell and Mott-Schottky studies revealed n-type conductivity, open circuit voltage (VOC) of 0.529 V, and short circuit current density (JSC) of 12.290 μA/cm2 at the CdS/electrolyte junction while the X-ray diffraction data and phase analysis revealed the formation of a blended hexagonal/cubic structures. Further, the scanning electron microscopic and the energy-dispersive X-ray spectroscopic studies elucidated a well-compact grain arrangement and agreed with the theoretical chemical composition (1:1) of CdS respectively.
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