Back-surface bridge type contact electrode of crystalline silicon solar battery and preparation method therefor

US10347776B2 · kind B2 · utility

Assignee

• TRINA SOLAR CO., LTD. · CN

Inventors

• Yifeng Chen · Taizhou City, CN
• Pierre J. Verlinden · Palo Alto, US
• Zhiqiang Feng · Changzhou City, CN
• Hui Shen · Nanhu, CN
• Pietro Peter ALTERMATT · Hannover, DE

Key dates

• Filing date: Jul 31, 2014
• Grant date: Jul 9, 2019
• Expiry date: Jul 31, 2034

Classification

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

Abstract

Disclosed are a back-surface bridge type contact electrode of a crystalline silicon solar battery and a preparation method therefor. The back-surface bridge type contact electrode of a crystalline silicon solar battery includes a local electrode connected to a local back surface field and a back surface electrode which is covered with a back surface passivation film on a contact surface with a silicon wafer substrate, at least one bridge electrode is provided between the local electrode and the back surface electrode, the contact surface of the bridge electrode and the silicon wafer substrate is also covered with the back surface passivation film, the local electrode is connected to the back surface electrode via the bridge electrode, and the back surface passivation film is also provided, besides at the connection region of the bridge electrode, between the local electrode and the back surface electrode.