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US 2019/0198258 A1Published application
Light absorption material and solar cell using the same
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsMICHIO SUZUKA, RYUUSUKE UCHIDA, TOMOYASU YOKOYAMA
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Abstract
A light absorption material comprising: a compound having a perovskite crystal structure represented by ABX3 where the A site contains (NH2)2CH+, the B site contains Pb2+, and the X site contains I−. A ratio of the number of atoms of I to the number of atoms of Pb measured by an X-ray photoelectron spectroscopy is 2.7 or less, or a ratio of the number of atoms of I to the number of atoms of Pb measured by a Rutherford backscattering spectroscopy is 2.9 or less.
Claims9
A light absorption material formed of a crystal represented by the chemical formula ((NH2)2CH)PbIa,
- where
- the value of a is not less than 1.8 and not more than 2.7.
Dependencies are inferred from the claim text.