公开(公告)号：US20170309407A1

公开(公告)日：2017-10-26

申请号：US15493220

申请日：2017-04-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： MICHIO SUZUKA ,  RYUUSUKE UCHIDA ,  TOMOYASU YOKOYAMA

IPC: H01G9/20 ,  C07C211/09

CPC classification number: H01G9/2059 ,  C07C211/09 ,  C09K11/664 ,  H01G9/2027 ,  H01L31/00 ,  H01L51/4253

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.