Tekniska Museet
100 Innovations - Tekniska museet

An exhibition at the National Museum of Science and Technology in Stockholm, 2012 – 2018

Solar power

Solar energy

Ingress för att beskriva innovationen

Solar power

Part of a solar cell module at Ångström Solar Center in Uppsala, Sweden. Photo: Truls Nord.

Solar energy

Detail of a solar cell module composed of 34 silicon solar cells. It was manufactured by Philips in 1978. TM44587. Photo: Anna Gerdén.

Kort fakta om innovationen

Kort fakta (2) om innovationen

Rubrik för små genier

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Solar energy

If you convert all the solar radiation that reaches the Earth into electricity for one hour, it would supply the world´s energy needs for an entire year. Unfortunately only a very small proportion of our electricity supply comes from solar power, about 0.15% in 2007. The technology is still expensive and inefficient. Silicon solar cells convert just 12 -18 % into electricity.

Solar panels convert the sun´s energy into heat while solar cells provide electricity. The solar cell was invented by chance in the 1940s when the researcher, Russell Ohl, shone a torch at a piece of silicon and noticed that it was sensitive to light. The first solar cells were used in toys among other things.

In 2007 Allen Barnett designed solar cells which converted 42.9 % of the sun´s energy into electricity. In theory solar cells have an efficiency of 86 %. 

Rubrik för nördar

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