Title:
PERC BATTERY BACK PASSIVATION STRUCTURE AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/082756
Kind Code:
A1
Abstract:
Disclosed in the present invention are a PERC battery back passivation structure and a preparation method therefor. The PERC battery back passivation structure comprises a silicon substrate, and further comprises a silicon oxide passivation film layer, an aluminum oxide passivation film layer, and a silicon nitride passivation film layer which are stacked in sequence; the silicon oxide passivation film layer is formed on the silicon substrate, the aluminum oxide passivation film layer is formed on the silicon oxide passivation film layer, and the silicon nitride passivation film layer is formed on the aluminum oxide passivation film layer. The back passivation structure facilitates reducing surface state density of the silicon substrate, and has low internal reflection; furthermore, aluminum oxide keeps a good passivation effect, an open-circuit voltage and a short-circuit current of a battery are increased, and then the conversion efficiency of the battery is improved.
Inventors:
WEI QINGZHU (CN)
MIAO FENGXIU (CN)
ZHANG SHUDE (CN)
LIAN WEIFEI (CN)
HU DANGPING (CN)
NI PAUL (CN)
MIAO FENGXIU (CN)
ZHANG SHUDE (CN)
LIAN WEIFEI (CN)
HU DANGPING (CN)
NI PAUL (CN)
Application Number:
PCT/CN2019/091037
Publication Date:
April 30, 2020
Filing Date:
June 13, 2019
Export Citation:
Assignee:
SUZHOU TALESUN SOLAR TECH CO LTD (CN)
International Classes:
H01L31/0216; H01L31/18
Foreign References:
| CN109461777A | 2019-03-12 | |||
| CN107658358A | 2018-02-02 | |||
| CN103560168A | 2014-02-05 | |||
| CN104882498A | 2015-09-02 | |||
| CN105355693A | 2016-02-24 |
Attorney, Agent or Firm:
SUZHOU CREATOR PATENT & TRADEMARK AGENCY LTD. (CN)
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