Study of the structural and morphological characteristics of the CdxTeyOz nanocomposite obtained on the surface of the CdS/ ZnO heterostructure by the SILAR method

Abstract

CdxTeyOz nanocomposite flms were grown by the SILAR method on the CdS/ZnO surface during cyclic processing in precursor solutions followed by removal of excess reagent from the surface of the substrate by washing in hydrogen peroxide. To stabilise the surface states and saturate with oxygen, the surface was annealed in a difusion furnace. XRD, RAMAN, and SEM analyses were used to analyse the phase composition, structural, and substructural parameters. The nanocomposite flm consists of diferent types of oxides, namely trigonal TeO3, Monoclinic TeO4 and CdTe3O8, orthorhombic TeO2 and CdTeO3. The formation of flms is explained using the Volmer–Weber growth mechanism. SEM analysis of the formed nanocomposite showed the presence of nanometer-scale globules. Partial amorphization of the heterostructure occurs due to the presence of nanometer-sized particles.