Nanopowder Compounds

The nanoparticles of CdS show unique physical, chemical and structural properties from the bulk. The melting point, electronic absorption spectra, band gap energy crystal structure, and other properties of cadmium sulfide nanoparticles (CdS-NP) are affected by size. Colloidal dispersions of CdS semiconductor nanoparticles can display spectacular colour variations of their fluorescence are based on the size of the particle.

The Cadmium Sulfide nanoparticles show quantum size effect, due to which the size of the cadmium sulphide particles is directly related to the absorption wavelength. The structure of the nanocrystalline CdS can play an important role in determining the electronic properties.

CdS is a significant visible-light-sensitive semiconductor, which makes it possible to utilize solar energy efficiently. CdS have been extensively used for photocatalytic splitting of water for hydrogen production and for photodegradation of organic or inorganic pollutants in air and water under visible light (VL).

The various advantages of CdS as a semiconductor are availability of discrete energy levels, tunable bandgap, size dependant optical properties, good chemical stability and easy preparation techniques. The various morphologies and unique properties of CdS semiconductor intrigued researchers to exploit it in the areas of photo electrocatalysis, biotechnology and communication. Cadmium Sulfide nanoparticles are ideal quantum confined semiconductors due to its optical and electronic properties. Due to wide band gap; it is used as a window material for hetero junction solar cells to avoid the recombination of photogenerated carriers which improves solar cell efficiency.

The application of Cadmium Sulfide Nanoparticles in the detection of visible radiation, enhancing efficiency of solar cells and a number of biological applications because Cadmium sulfide nanoparticles exhibits excellent physical, high stability, chemical and structural properties, availability, ease of preparation and handling.