Title:
BACK SURFACE FIELD PASTE FOR HIGH EFFICIENCY CRYSTALLINE SILICON SOLAR CELL AND PREPARATION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2018/040564
Kind Code:
A1
Abstract:
Provided are a back surface field paste for a high efficiency crystalline silicon solar cell and a preparation method thereof. An aluminum paste comprises: a paste A and a paste B. The paste A comprises: 50-60% of an aluminum powder; 2-6% of an inorganic binder; 10-20% of an organic binder; 16-26% of an organic solvent; and 2-8% of an additive. The weight percentages of all components in the paste A totals 100%. The paste B comprises: 85-95% of an aluminum powder; 0.1-1.0% of an inorganic binder; 1-5% of an organic binder; 2-8% of an organic solvent; and 1-3% of an additive. The weight percentages of all components in the paste B totals 100%. The prepared aluminum paste is applicable to traditional monocrystalline silicon solar cells with aluminum back surface fields. By increasing an activity of a paste to increase the thickness of a BSF layer and enhancing passivation of an aluminum film, a back surface recombination rate can be reduced more effectively, increasing a minority carrier collection rate, thereby increasing an open-circuit voltage, and increasing an anti-reflection effect.
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Inventors:
ZHU PENG (CN)
Application Number:
PCT/CN2017/080015
Publication Date:
March 08, 2018
Filing Date:
April 11, 2017
Export Citation:
Assignee:
NANTONG T SUN NEW ENERGY CO LTD (CN)
International Classes:
H01B1/22; H01B13/00; H01L31/0224
Foreign References:
| CN106098149A | 2016-11-09 | |||
| CN102737751A | 2012-10-17 | |||
| CN104637568A | 2015-05-20 | |||
| JP2014241348A | 2014-12-25 | |||
| JP2015191971A | 2015-11-02 |
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