Multi-layer sputtered metal seed for solar cell conductive contact

US10164131B2 · kind B2 · utility

Assignees

• SUNPOWER CORPORATION · US
• TOTAL MARKETING SERVICES · FR

Inventors

• Michael Cudzinovic · Sunnyvale, US
• Amjad Deyine · Paris, FR
• Robert Woehl · San Jose, US

Key dates

• Filing date: Dec 19, 2014
• Grant date: Dec 25, 2018
• Expiry date: Nov 14, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/547

Abstract

Multi-layer sputtered metal seed for solar cell conductive contacts and methods of forming solar cell conductive contacts are described. In an example, a solar cell includes a substrate. A semiconductor region is disposed in or above the substrate. A conductive contact is disposed on the semiconductor region and includes a seed material stack in contact with the semiconductor region. The seed material stack includes a first aluminum layer having a first crystallinity and disposed on the semiconductor layer, and a second aluminum layer having a second crystallinity and disposed on and having an interface with the first aluminum layer. The first crystallinity is different from the second crystallinity.