Manufacturing a solar cell with backside contacts

US7217883B2 · kind B2 · utility

Assignee

• Shell Solar GmbH · DE

Inventor

• Adolf Munzer · Selters (Westerwald), DE

Key dates

• Filing date: Nov 26, 2002
• Grant date: May 15, 2007
• Expiry date: Nov 26, 2022

Classification

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

Abstract

A solar cell involving a silicon wafer having a basic doping, a light-receiving front side and a backside, which is provided with an interdigital semiconductor pattern, which interdigital semiconductor pattern has a first pattern of at least one first diffusion zone having a first doping and a second pattern of at least one second diffusion zone, separated from the first diffusion zone(s) and having a second doping that differs from the first doping, wherein each second diffusion zone is arranged along the sides of at least one groove extending from the backside into the silicon wafer.