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How is amorphous silicon used in solar-powered calculators?

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A periodic table element square for silicon shows atomic number 14, symbol Si, atomic weight range, electron configuration, and name. Icons indicate it is a solid nonmetal with diamond crystal structure and equal relative strength. Labels explain each property. — silicon Chemical properties of the element silicon.

Amorphous silicon is used in solar-powered calculators because it can be efficiently manufactured as large-area thin films through vapor deposition. In these devices, the material functions as a solar cell that converts light into electricity to power the calculator's operations.1

Rather than using pure silicon, these applications typically utilize a silicon-hydrogen alloy known as hydrogenated amorphous silicon. The inclusion of approximately 10 percent hydrogen is critical, as it eliminates electronic defects that are otherwise intrinsic to pure amorphous silicon, thereby improving the material's performance. By leveraging this thin-film technology, manufacturers can create cost-effective, large-area semiconductor components suitable for the low-power requirements of handheld electronics.12