Chemical bath deposition

Chemical bath deposition (CBD) is a method to deposit thin films and nanomaterials. It is also known as Chemical solution Deposition (CSD), first described in 1869. it can be employed for large-area batch processing or continuous deposition. In 1933 Bruckman deposited lead(II) sulfide (PbS) thin film by chemical bath deposition (CBD) or solution grown method. This technique is extensively used to deposit buffer layers in thin film photo voltaic cells.

The major advantage of CBD is that it requires in its simplest form only solution containers and substrate mounting devices. One of the drawbacks of this method is the wastage of solution after every deposition. Chemical bath deposition yields stable, adherent, uniform and hard films with good reproducibility by a relatively simple process. The growth of thin films strongly depends on growth conditions, such as duration of deposition, composition and temperature of the solution, and topographical and chemical nature of the substrate.

The chemical bath deposition involves two steps, nucleation and particle growth, and is based on the formation of a solid phase from a solution. In the chemical bath deposition procedure, the substrate is immersed in a solution containing the precursors.This method is depends upon parameters like bath temperature,pH of the solution,Molarity of concentration and time.

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