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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AI Technical Trustability Update

While working on an update to my RF Cafe Espresso Engineering Workbook project to add a couple calculators about FM sidebands (available soon). The good news is that AI provided excellent VBA code to generate a set of Bessel function plots. The bad news is when I asked for a table showing at which modulation indices sidebands 0 (carrier) through 5 vanish, none of the agents got it right. Some were really bad. The AI agents typically explain their reason and method correctly, then go on to produces bad results. Even after pointing out errors, subsequent results are still wrong. I do a lot of AI work and see this often, even with subscribing to professional versions. I ultimately generated the table myself. There is going to be a lot of inaccurate information out there based on unverified AI queries, so beware.