JP2009200267A5 - - Google Patents

Claims (9)

A semiconductor substrate having a light-receiving surface and a back surface provided on the opposite side of the light-receiving surface; a first- conductivity-type first semiconductor layer and a second- conductivity-type first substrate disposed alternately along a predetermined direction on the back surface; A back junction solar cell having two semiconductor layers,
A first electrode layer provided on the first semiconductor layer and a second electrode layer provided on the second semiconductor layer;
The first electrode layer and the second electrode layer are electrically separated on an insulating layer disposed between the first semiconductor layer and the second semiconductor layer and the first electrode layer and the second electrode layer. It is, the solar cell. The solar cell according to claim 1 , wherein the first electrode layer and the second electrode layer are electrically separated from each other by a separation groove provided on the insulating layer . The first semiconductor layer is a semiconductor layer for forming a pn junction,
The second semiconductor layer is a semiconductor layer for forming a BSF structure,
The solar cell according to claim 2, wherein the separation groove is provided on the insulating layer on the first semiconductor layer. 4. The solar cell according to claim 1, wherein a contact width between the first semiconductor layer and the semiconductor substrate is larger than a contact width between the second semiconductor layer and the semiconductor substrate. A width of the first electrode layer is smaller than a contact width between the first semiconductor layer and the semiconductor substrate;
5. The solar cell according to claim 1, wherein a width of the second electrode layer is larger than a contact width between the second semiconductor layer and the semiconductor substrate. The solar cell according to claim 1, wherein the insulating layer is formed so as to straddle from the first semiconductor layer to the second semiconductor layer. 7. The device according to claim 1, further comprising: a transparent electrode layer disposed between the first semiconductor layer and the first electrode layer and between the second semiconductor layer and the second electrode layer. The solar cell described. The solar cell according to claim 1, wherein the semiconductor substrate is made of single crystal silicon, and the first semiconductor layer and the second semiconductor layer are made of amorphous silicon. The solar cell according to claim 8, further comprising an i-type amorphous silicon layer interposed between the semiconductor substrate and the first semiconductor layer and between the semiconductor substrate and the second semiconductor layer.