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1. (WO2018040571) LOW-WARPAGE BACK SURFACE ALUMINUM PASTE FOR CRYSTALLINE SILICON SOLAR CELL

Pub. No.:    WO/2018/040571    International Application No.:    PCT/CN2017/080436
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Fri Apr 14 01:59:59 CEST 2017
IPC: H01B 1/22
H01L 31/0224
Applicants: NANTONG T-SUN NEW ENERGY CO., LTD.
南通天盛新能源股份有限公司
Inventors: ZHU, Peng
朱鹏
Title: LOW-WARPAGE BACK SURFACE ALUMINUM PASTE FOR CRYSTALLINE SILICON SOLAR CELL
Abstract:
A low-warpage back surface aluminum paste for a crystalline silicon solar cell. The paste is prepared from the following materials in parts by mass: 85-95 parts of aluminum powder, 0.1-0.5 parts of glass powder, 4-13 parts of organic carrier and 0.6-2 parts of additive. The glass powder with large particle sizes is used for effectively lowering the coefficient of expansion of the aluminum paste. In addition, as the content of the aluminum powder in the paste formulation is high, the content of aluminum in a back surface field is thus guaranteed while the printing wet weight of the aluminum paste is reduced, thereby achieving the purpose of reducing warpage of a silicon wafer without impairing the cell performance.