Why do monocrystalline solar cells have rounded/cropped edges?

Thread starter cemtu
Start date May 20, 2021
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Cells Solar Solar cells

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Monocrystalline solar cells have rounded or cropped edges primarily due to the manufacturing process, which involves cutting from a cylindrical boule. Historically, circular solar cells were used, but square shapes are now preferred because they pack more efficiently in solar panels. The rectangular shape of individual cells allows for better space utilization and reduces wasted area. Additionally, the outer regions of the boule tend to form polycrystalline structures, making monocrystalline cells more desirable for their efficiency. The evolution in design reflects both practical and performance considerations in solar technology.

May 20, 2021

cemtu

Homework Statement: Why do monocrystalline solar cells have rounded/cropped edges? And why do solar cells need to be square-shaped in general?

Relevant Equations: No equations

There were circular solar cells 30 years ago. Why do we have square-shaped solar cells now? Why square now?

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May 20, 2021

Mayhem

Rectangles pack better than circles. Seems that individual cells also assume a rectangular shape. .

May 20, 2021

hmmm27

Gold Member

Way I understand it, the outside of the boule tends towards polycrystalline formation (mono is preferable).

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