Japan Sharp announced on the 4th that it has successfully developed a solar cell with a photoelectric conversion rate of 36.9%, setting a new world record of 35.8% in 2009. The new results can be applied to satellites, etc. It is expected that it will be put into practical use after 2014. It is Sharp "compound solar cell" that refreshes the record. The battery is characterized by not using silicon, but by indium, gallium and other elements as materials, with three superimposed light absorption layer. Researchers have reduced the resistance at the junction of the battery layers and successfully increased the conversion rate.
Three junction solar cell structure. (Source: Sharp Corporation)
Sharp has achieved the world's highest non-concentrating solar cell conversion efficiency, which is 36.9%. They use a three-junction composite solar cell with a stacked three-layer structure.
A three-junction composite solar cell employs a photon absorption layer, and the compound used to prepare such an absorption layer contains two or more elements such as indium, gallium, and the like. Due to their high conversion efficiency, this composite solar cell is mainly used for space satellites.
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