Solar cell device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9362425-B2
Application number	US-201314396614-A
Country	US
Kind code	B2
Filing date	Apr 26, 2013
Priority date	Apr 26, 2012
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

In order to provide a solar cell device having increased reliability, the present invention is provided with: a substrate having a semiconductor region containing silicon at one primary surface side; a first electrode provided on the one primary surface and containing silver as the primary component; and a second electrode connected to the first electrode on the one primary surface and containing aluminum as the primary component. The first electrode is a solar cell device containing elemental tin.

First claim

The invention claimed is:

1. A solar cell device comprising:
a substrate including a semiconductor region containing silicon in a main surface thereof;
a first electrode on the main surface, wherein the first electrode contains silver as a main proportion with respect to all components of the first electrode, wherein the first electrode contains elemental tin, and wherein the first electrode includes a through hole with tin deposited around the through hole; and
a second electrode connected to the first electrode on the main surface via the through hole, wherein the second electrode contains aluminum as a main proportion with respect to all components of the second electrode.

2. The solar cell device according to claim 1 , wherein the elemental tin is present in the first electrode in an amount of 0.1 to 5 parts by mass based on 100 parts by mass of silver.

3. The solar cell device according to claim 1 , wherein the second electrode has a larger average thickness than the first electrode.

4. The solar cell device according to claim 1 , wherein the main surface comprises at least a region in which the second electrode is not formed, and the solar cell device further comprising a passivation layer on the main surface in the at least a region in which the second electrode is not formed.

Assignees

• Kyocera Corp

Inventors

• Yoshida Takanobu

Classifications

• H10F77/211 Primary

  for photovoltaic cells · CPC title

• H10F19/902

  for series or parallel connection of photovoltaic cells · CPC title

• H10F77/215 Primary

  Geometries of grid contacts · CPC title

• H01L31/0504

  Electricity · mapped topic

• H01L31/1804

  Electricity · mapped topic