Patent ID: 9722123
Date: 2017-08-01
CPC Classifications: H01L,Y02E

Claim:
1. A solar cell, comprising: a first solar cell; a second solar cell; and an intermediate layer between the first and second solar cells, the first solar cell including a Si layer as a light absorbing layer, the second solar cell including as a light absorbing layer one of a group I-III-VI wherein the metal compound sublayer is represented by MX where M denotes at least one type of element selected from Nb, Mo, Pd, Ta, W, and Pt and X denotes at least one type of element selected from S, Se, and Te excluding a compound of M being Mo and X being Se, the Si layer of the first solar cell is a narrow-gap light absorbing layer, the one of a group I-III-VI the first solar cell, the n a surface of the metal compound sublayer facing to the second solar cell is in direct contact with a surface of the light absorbing layer of the second solar cell facing to the metal compound sublayer, and the n