STACK-SHAPED MULTI-JUNCTION SOLAR CELL AND METHOD FOR ITS PRODUCTION Russian patent published in 2021 - IPC H01L31/04 

FIELD: solar cells.

SUBSTANCE: invention relates to a stack-shaped multi-junction solar cell with a front side in contact with a back side, which includes a solar cell stack with a front side, a back side and a through contact hole extending from the front side to the back side of the solar cell stack, a front-side terminal, a rear-side terminal, a dielectric insulating layer, and a contact layer, wherein the solar cell stack includes a germanium substrate layer forming the back, a germanium subcell and at least two III-V subcells located on top of each other in the specified sequence, the through contact hole has a solid lateral surface and an oval cross-section, the front side contact terminal is located on the front side of the solar cell stack and is permanently connected to the front side of the solar cell stack with the possibility of current flow. A dielectric insulating layer covers a portion of the front side of the solar cell stack not covered by the front side terminal, an edge region of the top side of the front side terminal, a side surface of the through contact hole, and a portion of the rear side of the solar cell stack adjacent to the through contact hole. The contact layer lies on the dielectric insulating layer from the portion of the upper side of the front side contact terminal not covered with the dielectric insulating layer through the through contact hole to the back side of the solar cell stack, is permanently connected to the upper side of the front side contact terminal with the possibility of current flow and is permanently connected to a dielectric insulating layer, and the rear side terminal covers a portion of the rear side of the solar cell stack not covered with a dielectric insulating layer, and is permanently connected to the rear side of the solar cell stack with the possibility of current flow.

EFFECT: creation of a method for obtaining stack-shaped multi-junction solar cell with a front side in contact with the back side.

23 cl, 6 dwg