What is Monocrystalline silicon?
Silicon photovoltaic cells can be made of either monocrystalline or polycrystalline material. The former are designed from a pure and high-efficiency single crystal. The latter are cut from ingots consisting of a number of crystals, where grain boundaries introduce defects and negative impact on electrical properties of material. That is why single-crystal silicon solar cells are so efficient and so expensive.
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