CIGS solar cells can also be used a bottom layer in the tandem solar cell design helping reduce production costs
Researchers at Uppsala University in Sweden have created a new world record by designing a CIGS solar cell with 23.64 percent energy conversion efficiency. The previous record was held by the Solar Frontier, Japan, whose CIGS solar cell recorded 23.35 percent solar efficiency.
Tandem solar cells have been touted as the much-needed technological upgrade to solar cells, offering over 30 percent energy conversion efficiency. However, the production costs ofCIGS solar cells are a special type of solar cell with normal window glass that includes layers of different elements performing a specific function. These layers are typically copper, indium, gallium, and selenide , with additional layers of silver and sodium also included in the setup.
Solar Frontier in Japan was the first to demonstrate that the CIGS solar cells can deliver energy conversion efficiency beyond 23 percent. Now, the researchers at Uppsala University and the First Solar European Technology Center have created a new world record with 23.64 percent efficiency. Their feat was confirmed independently by the Fraunhofer ISE Institute in Germany.
The multiple layers in the CIGS aim to deliver on this concept. Still, the researchers also needed to understand how various components contributed to the increased efficiency. With partners at other institutes, the team carried out nano-XRF at the Max IV facility in Lund to conduct a compositional analysis of the layers.
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