Morphological evolution of CdS films prepared by chemical bath deposition

In this article, the growth process of chemical bath deposited CdS films was systematically investigated. The structural, optical, and morphological properties were investigated by X-ray diffraction (XRD), transmission electron microscope (TEM), UV–Vis spectrophotometer, scanning electron microscope (SEM), respectively. CdS nanocubes with size of less than 500 nm and nanocrystallites with diameter of less than 5 nm forming in reaction solution are observed. According to the TEM results and the SEM morphological evolution of CdS films, a crystallite-by-crystallite growth mechanism is proposed to elucidate the growth process of chemical bath deposited CdS films based on the present growth mechanism.