Solar cell, method for preparing the same, and photovoltaic module

US12166142B1 · kind B1 · utility

Assignees

• ZHEJIANG JINKO SOLAR CO., LTD. · CN
• JINKO SOLAR CO., LTD. · CN

Inventors

• Zhao Wang · Hubei, CN
• Jie Yang · Foster City, US
• Peiting ZHENG · 余新镇, CN
• Xinyu Zhang · Changzhou City, CN
• Mengchao Shen · 盐官镇, CN
• Jie Mao · Zhejiang, CN
• Jiajia Zhu · 盐官镇, CN
• Jingming ZHENG · Zhejiang, CN

Key dates

• Filing date: Jan 26, 2024
• Grant date: Dec 10, 2024
• Expiry date: Jan 26, 2044

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10F77/703

Abstract

A solar cell is provided, including a substrate having a rear surface including P-type regions and N-type regions, first dielectric layers each formed over a N-type region, first doped polysilicon layers each formed on a first dielectric layer and doped with an N-type doping element, second dielectric layers each formed over a P-type region, second doped polysilicon layers each formed on a second dielectric layer and doped with a P-type doping element, a passivation layer formed over surfaces of the first and second doped polysilicon layers, and first and second electrodes penetrating the passivation layer. Each first electrode is electrically connected to a first doped polysilicon layer and each second electrode is electrically connected to a second doped polysilicon layer. A first roughness of a surface of a first doped polysilicon layer is greater than a second roughness of a surface of a second doped polysilicon layer.