Re: Piezoelectric dimensions problem in energy harvesting

AI Thread Summary
The discussion centers on a project involving piezoelectric energy harvesting using a cantilever structure modeled in COMSOL. The user is experiencing non-linear electric potential values as the thickness of the piezoelectric layer (ZnO) increases, despite theoretical expectations of a direct proportionality to thickness. Responses suggest relying on actual device data rather than theoretical models, as real-world devices often exhibit complexities that deviate from simple theoretical predictions. It is recommended to consult the datasheet for the specific piezoelectric device to better understand its properties. Accurate data is essential for resolving discrepancies between theory and practical outcomes.
jagan414
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hi

I am doing project on piezoelectric energy harvesting which is a cantilever structure using COMSOL. I have some doubts related to my project. I designed cantilever structure having three layers substrate (SiC), piezo (ZnO) and electrode (Al). My doubt is that when piezoelectric layer thickness is increasing, generated electric potential values are nonlinear . But I saw theoritically electric potential is directly proportional to thickness of piezoelectric. Please anyone share the information regarding this topic.

Thank you
 
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I wouldn't use theory for that problem. Actual devices are usually more complicated than simple theories.

Choose the actual piezoelectric device, then get the datasheet for it's properties.
 
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