US 2014/0230889 A1 · SOLAR CELL, METHOD FOR MANUFACTURING THE SAME AND SOLAR CELL MODULE

Abstract

A solar cell, a method for manufacturing the same and a solar cell module are described. The solar cell includes a substrate of a second conductivity type, an emitter layer, a first oxide layer, an auxiliary passivation layer, a back surface field layer, a second oxide layer, a first electrode and a second electrode. The substrate includes a first surface and a second surface opposite each other. The emitter layer, the first oxide layer and the auxiliary passivation layer are sequentially disposed on the first surface. Materials of the auxiliary passivation layer and the first oxide layer are different. The back surface field layer and the second oxide layer are sequentially disposed on the second surface. The first electrode is disposed above the first surface and contacts with the emitter layer. The second electrode is disposed above the second surface and contacts with the back surface field layer.

Claims20

Dependent claims

A solar cell including:

a substrate of a second conductivity type including a first surface and a second surface opposite to said first surface;
an emitter layer of a first conductivity type disposed in said substrate under said first surface;
a first oxide layer disposed on said emitter layer;
an auxiliary passivation layer disposed on said first oxide layer, wherein materials of said auxiliary passivation layer and said first oxide layer are different from each other;
a back surface field layer of said second conductivity type disposed in said substrate under said second surface;
a second oxide layer disposed on said back surface field layer;
a first electrode disposed above said first surface and penetrating through said auxiliary passivation layer and said first oxide layer to contact with said emitter layer;
and
a second electrode disposed above said second surface and penetrating through said second oxide layer to contact with said back surface field layer.

6 more elements

A method for manufacturing a solar cell, including:

providing a substrate of a second conductivity type, wherein said substrate includes a first surface and a second surface opposite to said first surface;
forming an emitter layer of a first conductivity type in said substrate under said first surface;
forming a blocking layer on said first surface to cover said emitter layer;
forming a back surface field layer of said second conductivity type in said substrate under said second surface;
removing said blocking layer;
forming a first oxide layer and a second oxide layer respectively on said emitter layer and said back surface field layer;
forming an auxiliary passivation layer on said first oxide layer, wherein materials of said auxiliary passivation layer and said first oxide layer are different from each other;
forming a first electrode above said first surface and penetrating through said auxiliary passivation layer and said first oxide layer to contact with said emitter layer;
and
forming a second electrode above said second surface and penetrating through said second oxide layer to contact with said back surface field layer.

7 more elements

Dependencies are inferred from the claim text.

Solar cell, method for manufacturing the same and solar cell module

Life of this patent

Solar cell, method for manufacturing the same and solar cell module

Life of this patent

Abstract

Claims20