Patent ID: 9722104
Date: 2017-08-01
CPC Classifications: H01L,Y02E

Claim:
1. A solar cell, comprising: a semiconductor substrate; a tunnel layer on a first surface of the semiconductor substrate; a first conductive type semiconductor region on the tunnel layer and containing impurities of a first conductive type; a second conductive type semiconductor region on a second surface opposite to the first surface of the semiconductor substrate and containing impurities of a second conductive type opposite to the first conductive type; a first passivation film on the first conductive type semiconductor region; a first electrode formed on the first passivation film and connected to the first conductive type semiconductor region through an opening formed in the first passivation film; a second passivation film on the second conductive type semiconductor region; a second electrode formed on the second passivation film and connected to the second conductive type semiconductor region through an opening formed in the second passivation film; and an isolation portion for preventing a contact between the first conductive type semiconductor region and the second conductive type semiconductor region, wherein the isolation portion excludes the tunnel layer and the first conductive type semiconductor region, and is in an edge portion of the first surface of the semiconductor substrate, and wherein the first passivation film covers the first surface of the semiconductor substrate and the isolation portion together.