Patent ID: 6534704
Filing Date: 2003-03-18
Classification: H01L,Y02E

Abstract:
A solar cell comprising a first semiconductor layer that is p-type, and a second semiconductor layer that is n-type formed over the first semiconductor layer,the solar cell comprising a layer A between the first semiconductor layer and the second semiconductor layer, the layer A being made of an insulator or a semiconductor different from the first semiconductor layer and the second semiconductor layer, wherein a band gap Eg1 of the first semiconductor layer and a band gap Eg2 of the second semiconductor layer satisfy the relationship Eg12, an electron affinity &khgr;1 (eV) of the first semiconductor layer and an electron affinity &khgr;2 (eV) of the second semiconductor layer satisfy the relationship 0&lE;(&khgr;1âˆ’&khgr;2)<0.5, an average layer thickness of the layer A is 1 nm or more and 20 nm or less, and the layer A comprises Cd and S as main components.