Title:
ALL-ALUMINUM BACK-FIELD BACK SILVER PASTE AND PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/006797
Kind Code:
A1
Abstract:
Disclosed are an all-aluminum back-field back silver paste and a preparation method therefor and the use thereof. The all-aluminum back-field back silver paste comprises the following components in parts by weight: 10-80 parts of a silver powder with a special requirement and a purity of greater than 99.99%, 0.5-5 parts of a house-made and lead-free main body glass powder, 0-3 parts of an auxiliary glass powder with a low melting point, 1-50 parts of a metal powder with a special requirement and a low melting point, 15-50 parts of an organic binder, and 0.01-1 part of an organic auxiliary agent. The all-aluminum back-field back silver paste can be directly printed onto an aluminum back field paste, thereby making sure that the aluminum back field paste has a considerable welding tension and aging tension, and avoiding the problem of serious electric leakages caused by metal defects created by the direct contact between silver and a silicon wafer, thus improving the photoelectric conversion efficiency of a crystalline silicon battery, and the width of a back electrode and the printed pattern can be freely adjusted, thus reducing the cost of a back electrode paste.
Inventors:
ZHU PENG (CN)
Application Number:
PCT/CN2018/098230
Publication Date:
January 09, 2020
Filing Date:
August 02, 2018
Export Citation:
Assignee:
NANTONG T SUN NEW ENERGY CO LTD (CN)
International Classes:
H01B1/22
Foreign References:
| CN104505139A | 2015-04-08 | |||
| CN105810293A | 2016-07-27 | |||
| CN106611625A | 2017-05-03 | |||
| CN107068293A | 2017-08-18 | |||
| US20140083495A1 | 2014-03-27 |
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