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This document provides an overview of solar cells, including their history, working principle, types, applications, and future prospects. It discusses how solar cells work to convert light energy into electricity, and notes that solar cell efficiency depends on the type of material used, with monocrystalline silicon being the most efficient. The document also outlines various current and potential future applications of solar cells, from power generation to use in calculators and phones, and concludes that solar cells will become a more cost-efficient and useful renewable energy source.Read less