Solar cell and method of manufacturing solar cell

US10930810B2 · kind B2 · utility

Assignee

• PANASONIC HOLDINGS CORPORATION · JP

Inventors

• Daisuke Fujishima · Tokyo, JP
• Hirotaka Katayama · Saitama, JP

Key dates

• Filing date: Jan 25, 2019
• Grant date: Feb 23, 2021
• Expiry date: Mar 3, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50

Abstract

A solar cell includes a photoelectric converter having a p-type surface and an n-type surface on a principal surface, a p-side conductor, a p-side Sn layer, an n-side conductor, an n-side Sn layer, a p-side seed layer between the p-type surface and p-side conductor, an n-side seed layer between the n-type surface and n-side conductor, a p-side metal layer covering the p-side seed layer and including metal different from metal of the p-side seed layer, and an n-side metal layer covering the n-side seed layer and including metal different from metal of the n-side seed layer. The diffusion coefficient of copper with respect to the p-side metal layer is less than the diffusion coefficient of copper with respect to a p-side Sn layer. The diffusion coefficient of copper with respect to the n-side metal layer is less than the diffusion coefficient of copper with respect to an n-side Sn layer.