The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 21, 2025
Filed:
Aug. 30, 2022
Tongwei Solar (Chengdu) Co., Ltd., Chengdu, CN;
Haichuan Zhang, Chengdu, CN;
Shihu Lan, Chengdu, CN;
Liping Zhang, Chengdu, CN;
Hui Zhao, Chengdu, CN;
Jianhua Shi, Chengdu, CN;
Haoxin Fu, Chengdu, CN;
Junlin Du, Chengdu, CN;
Fanying Meng, Chengdu, CN;
Zhengxin Liu, Chengdu, CN;
TONGWEI SOLAR (CHENGDU) CO., LTD., Chengdu, CN;
Abstract
A preparation method of a heterojunction solar cell includes following steps: depositing a first passivation layer on a first surface of a silicon substrate by using a gas source, a base material of the first passivation layer being hydrogenated amorphous silicon; during depositing hydrogenated amorphous silicon of the first passivation layer, allowing the gas source to gradually incorporate carbon dioxide, and controlling a proportion of carbon dioxide in the gas source to gradually increase with increase of a thickness of the first passivation layer which has been deposited.