| 摘要 |
A device having a multi-junction solar cell and a protection diode structure, whereby the multi-junction solar cell and the protection diode structure have a common rear surface and front sides separated by a mesa trench. The common rear surface comprises an electrically conductive layer, and the light enters through the front side into the multi-junction solar cell. The cell includes a stack of a plurality of solar cells, and has a top cell, placed closest to the front side, and a bottom solar cell, placed closest to the rear side, and a tunnel diode is placed between adjacent solar cells. The number of semiconductor layers in the protection diode structure is smaller than the number of semiconductor layers in the multi-junction solar cell. The sequence of the semiconductor layers in the protection diode structure corresponds to the sequence of semiconductor layers of the multi-junction solar cell. |
| 主权项 |
1. A solar cell device comprising:
a multi-junction solar cell; and a protection diode structure, wherein the multi-junction solar cell and the protection diode structure have a common rear surface and front sides separated by a mesa trench, and wherein the common rear surface comprises an electrically conductive layer, and the light enters through the front side into the multi-junction solar cell, wherein, the multi-junction solar cell comprises a stack of at least two solar cells and has a top solar cell placed closest to the front side and has a bottom solar cell placed closest to the rear side, and each of the at least two solar cells comprises an n-p junction, and a tunnel diode is placed between adjacent solar cells, wherein a number of semiconductor layers in the protection diode structure is smaller than a number of semiconductor layers in the multi-junction solar cell, but a sequence of remaining semiconductor layers in the protection diode structure is identical to a sequence of semiconductor layers of the multi-junction solar cell, wherein, in a case of the protection diode structure, at least one top protection diode and a bottom protection diode placed closest to the rear side, are formed and a tunnel diode is placed between adjacent protection diodes, and wherein a number of n-p junctions in the protection diode structure is smaller at least by one than the number of the n-p junctions of the multi-junction solar cell, wherein a terminal contact structure containing one or more metal layers and an electrically conductive contact layer below the terminal contact structure and having a plurality of semiconductor layers is formed on the front side of the multi-junction solar cell, and wherein the protection diode structure and the plurality of semiconductor layers comprises a tunnel diode. |
