Photovoltaic module, solar cell, and manufacturing method therefor

US10991838B1 · kind B1 · utility

Assignees

• Jinko Green Energy (Shanghai) Management Co., LTD. · CN
• ZHEJIANG JINKO SOLAR CO., LTD. · CN

Inventors

• Jie Yang · Foster City, US
• Wenqi Li · Kunming, CN
• Xueting Yuan · Shanghai, CN
• Xinyu Zhang · Changzhou City, CN
• Hao Jin · Shanghai, CN

Key dates

• Filing date: Jun 15, 2020
• Grant date: Apr 27, 2021
• Expiry date: Jun 15, 2040

Classification

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

Abstract

Provided is a solar cell. The solar cell may include a semiconductor layer and a passivation film stack provided on a back surface of the semiconductor layer. The passivation film stack may include a first passivation layer provided on the back surface of the semiconductor layer and including a silicon-rich layer with a silicon atom concentration ranging from 5×1021/cm3 to 2.5×1022/cm3; a second passivation layer provided on a surface of the first passivation layer and including an oxygen-rich and nitrogen-rich layer; and a third passivation layer provided on a surface of the second passivation layer and including at least one silicon nitride film with a gradient-varied refractive index. A first refractive index of the first passivation layer may be greater than a second refractive index of the second passivation layer and smaller than a third refractive index of the third passivation layer.