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Cadmium Sulfide (CdS)

Cadmium sulfide (CdS) is a piezoelectric material that exhibits the ability to generate an electric charge in response to mechanical stress, and vice versa, making it useful for a variety of applications, including sensors, transducers, and energy harvesting devices.

Cadmium sulfide is a binary compound composed of cadmium and sulfur atoms. It is a direct bandgap semiconductor with a bandgap energy of about 2.4 eV, which makes it suitable for photovoltaic applications as well.

In terms of its piezoelectric properties, CdS exhibits a relatively low piezoelectric coefficient compared to other piezoelectric materials, but it can still be used in certain applications where a lower sensitivity is sufficient.

One of the challenges with using cadmium sulfide as a piezoelectric material is its toxicity, which limits its use in certain applications. However, there are efforts to develop cadmium-free piezoelectric materials, such as zinc oxide and aluminum nitride, which could be viable alternatives to CdS.


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