Nanopowder Compounds

Cadmium sulfide nanopowder (CdS-n) is remarkable electron acceptor for hybrid solar cell applications. Cadmium sulfide (Cds) is an excellent photosensitive material and has a direct band-gap. Cadmium sulfide (CdS) is one of the most important II–VI group semiconductors. It has been proved to be an excellent photoactive and charge transport material in optoelectronic devices and is appropriate to be an acceptor in hybrid photovoltaic (HPV) devices.

It manifests some attractive properties such as structural, optical and photo-conducting that is very different from their bulk properties. These properties make them attractive for their possible applications in solar cells photo detector, laser, LED, etc. The Cds 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.

The various advantages of CdS as a semiconductor are availability of discrete energy levels, tunable bandgap, size dependent 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. Cds nanoparticles are ideal quantum confined semiconductors due to their optical and electronic properties. Due to wide-bandgap; it is used as a window material for heterojunction solar cells to avoid the recombination of photogenerated carriers which improves solar cell efficiency.

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