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POPSPhotovoltaics - How they Work It'd be nice to see a video of this.... The photovoltaic effect was first discovered in 1839. The first photovoltaic cells were made in 1918. Since then Einstein developed photovoltaics. There was a lot of research and development during the 1960's Space Race, when satellites were powered by solar panels. The 1970's saw the beginning of residential solar use. For houses living far off the electricity grid, photovoltaics made financial sense. Prices have since fallen from $30 a watt down to $7 a watt for residential installations. Now due to technology advancing and power costs rising, the price of solar energy is still falling. The future of solar energy looks bright indeed.
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POPSThin Film Photovoltaics Thin film photovoltaics are an interesting develpment. Fuelled by a worldwide shortage of silicon (caused by a huge growth in demand for solar energy) thin film solar has risen in popularity. While less efficient (now) than traditional solar panels, thin film is cheaper to produce.
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