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Understanding the Science behind Solar Energy
The document discusses solar energy and photovoltaics. It provides information on the amount of solar energy received by the Earth and how it can be harnessed through passive solar and solar collectors. It describes how photovoltaic cells work by using semiconductors like silicon to generate electricity from sunlight through absorption of photons that promote electrons to a higher energy level. Solar cells made from monocrystalline silicon have the highest conversion efficiencies around 18%.
