Optical properties of flower‐like CdS prepared by a hydrothermal method with SDBS as surfactant

Abstract

In this article, flower-like CdS structures have been prepared by a hydrothermal method with SDBS as surfactant. The influences of different experimental conditions on the morphologies, UV-Vis and fluorescence properties of CdS have been investigated. The performances of CdS have been analyzed by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), ultraviolet-visible (UV-Vis) and room-temperature photoluminescence (PL). The XRD result indicates that the flower-like CdS structures are of hexagonal phase. The FESEM results indicate that the main role of SDBS is to make the CdS crystals assemble together to form the flower-like structures. The UV-Vis results show CdS has a strong absorption in the ultraviolet region and visible-light region. The PL results show CdS has two emission peaks, respectively at 461 nm and 553 nm. The growth mechanism for the formation of flower-like CdS structures is also described.

Sulfur ion concentration dependent morphological evolution of CdS thin films and its subsequent effect on photo-electrochemical performance

“…The widening in the band gap can be attributed to the increased thiourea concentration, change in morphology and surface nanostructures. 42,43 It has been reported that an increase in thiourea concentration reduces the particle size and widens the band gap. 15 3.9 Photo electrochemical solar cell study Fig.…”