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The [link url=https://www.cems.umn.edu/research-areas/electronic-magnetic-and-photonic-materials target=_blank]University of Minnesota[/link] has created a [link url=http://www.nature.com/articles/ncomms15167 target=_blank]new generation[/link] of transparent semiconductors, which are primarily used in solar cells. The used materials are groundbreaking: scientists replaced the until now mainly used chemical indium with the [link url=https://en.wikipedia.org/wiki/Prices_of_elements_and_their_compounds target=_blank]six-times cheaper[/link] barium.