Perovskite solar cells are characterized by having a "perovskite crystal structure" as a light-absorbing material. The light-absorbing layer has an organic-inorganic crystal structure called ``abx3 type.'' Perovskite is the name of a mineral (calcium titanium oxide: catio₃) that was originally discovered in Russia in 1839. Its distinctive feature lies in its crystal structure called "abx₃ type". Perovskite means perovskite, and is called ``perovskite''. What is "perovskite solar cell"? The ``Perovska.''
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