Solar cell generate electricity
Arrays of solar cells are used to make solar modules that generate a usable amount of direct current (DC) from sunlight. In 1839, at age 19, he built the world's first photovoltaic cell in his father's laboratory. Adjusting for inflation, it cost $96 per watt for a solar module in the mid-1970s. Process improvements and a very large boost in production have brought that figure down more than 99%, to 30¢ per watt in 2018 and as low as 20¢ per watt in 2020. Solar cell efficiency may be broken down into reflectance efficiency, thermodynamic efficiency, charge carrier separation efficiency and conductive efficiency.
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