![]() A 20% efficiency solar cell were patented in 1992. In 1985, researchers at University of New South Wales, Australia were able to construct a solar cell that has over 20% efficiency. The efficiency skyrocketed to 14% in 1960. The same company’s solar cell efficiency was increased to 9% in 1958 and 10% in 1959. In 1957, Hoffman Electronics were able to introduce cells with an increased efficiency, at 8%. In 1955, Hoffman Electronics-Semiconductor Division introduced photovoltaic products with only a 2% efficiency, with an energy cost of $1,785/Watt (USD). However, as time passes, efficiency increased while the cost decreased. In addition, running them were a bit costly. Įarly silicon solar photovoltaic sells did not, however, have good efficiency. The first solar cell using silicon monocrystalline was constructed in 1941. The first silicon solar cells were not discovered until 1918, when Jan Czochralski, a Polish scientist, discovered that a monocrystalline silicon can be used for solar cell production upon the discovery of the method of the production of monocystalline silicon itself. In 1887, Heinrich Hertz discovered that voltage can be changed at which sparks between two metal electrodes would be initiated, via ultraviolet light. In 1873, Willoughby Smith made a discovery of photovoltaic effects in selenium. Solar photovoltaics were first used in 1839 when a French physicist, Alexandre Edmond Becquerel, discovered that light can be converted into electricity when he experimented with metal electrodes and electrolytes.
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