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1. (WO2018157493) P-TYPE PERC DOUBLE-SIDED SOLAR CELL AND PREPARATION METHOD THEREFOR, AND ASSEMBLY AND SYSTEM THEREOF

Pub. No.:    WO/2018/157493    International Application No.:    PCT/CN2017/087356
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Thu Jun 08 01:59:59 CEST 2017
IPC: H01L 31/0224
H01L 31/068
H01L 31/18
Applicants: GUANGDONG AIKO SOLAR ENERGY TECHNOLOGY CO., LTD
广东爱康太阳能科技有限公司
ZHEJIANG AIKO SOLAR ENERGY TECHNOLOGY CO., LTD
浙江爱旭太阳能科技有限公司
Inventors: FANG, Jiebin
方结彬
HO, Ta-neng
何达能
CHEN, Gang
陈刚
Title: P-TYPE PERC DOUBLE-SIDED SOLAR CELL AND PREPARATION METHOD THEREFOR, AND ASSEMBLY AND SYSTEM THEREOF
Abstract:
A P-type PERC double-sided solar cell and a preparation method therefor, and an assembly and system thereof. The cell comprises back silver main gates (1), aluminum gate lines (2), a back silicon nitride film (3), a back aluminum oxide film (4), P-type silicon (5), an N-type emitter (6), a front silicon nitride film (7), and a front silver electrode (8) that are stacked in sequence from bottom to top. The back silicon nitride film and the back aluminum oxide film are subjected to laser grooving to form 30-500 laser grooving areas arranged in parallel. 1-50 sets of laser grooving units are provided in each laser grooving area. The aluminum gate lines are connected to the P-type silicon by means of the laser grooving areas. The aluminum gate lines are perpendicularly connected to the back silver main gates. The cell can absorb sunlight from two sides, enlarges the application range of the solar cell, and improves the photoelectric conversion efficiency.