Patent ID: 9209321
Filing Date: 2015-12-08
Classification: H01L,Y02E,Y02P

Abstract:
1. A solar cell, comprising: a semiconductor substrate made of silicon and having a first main surface used as an incident light side and a second main surface used as a backside; a passivating layer sequence situated on the second main surface, wherein the passivating layer sequence has a plurality of island-type recesses in which passivating layer material has been completely removed; a thin first metal layer situated on the passivating layer sequence and in the recesses such that the first metal layer covers the entire backside of the substrate; a thin dielectric cover layer covering the first metal layer, wherein the thin dielectric cover layer has a first regular arrangement of narrow line-type openings and a second regular arrangement of one of wider line-type openings or extended island-type openings, the openings of the first and second regular arrangement extending through the dielectric layer and exposing portions of a surface of the first metal layer, wherein the first regular arrangement of openings and the second regular arrangement of openings are aligned substantially transversely to each other; and a conductive second metal layer which contacts, and is able to be soldered at, the portions of the surface of the first metal layer exposed by the openings of the first regular arrangement and the openings of the second regular arrangement.