ALUMINUM PASTE USED FOR LOCAL BACK SURFACE FIELD SOLAR CELL AND LOCAL BACK SURFACE FIELD SOLAR CELL USING THE ALUMINUM PASTE
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United States of America
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Issued Date -
Jan 23, 2020
app pub date -
Jul 23, 2018
filing date -
Jul 23, 2018
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Abstract
An aluminum paste used for local back surface field solar cells is introduced. The aluminum paste which has large-sized aluminum powder; an organic vehicle including a solvent and a resin or cellulose; wherein a ratio of a median particle size (μm) to an oxygen content (%) (median particle size (μm)/oxygen content (%)) of the large-sized aluminum powder ranges from 10 to 15. The aluminum paste used for local back surface field solar cell and the local back surface field solar cell using the aluminum paste eliminate the powder extraction of aluminum powder, the aluminum beads, the adhesion of the aluminum layer to the SiNx capping layer, and the void issue occurred at the LBSF positions, which further improves the photoelectric conversion efficiency of the local back surface field solar cell.
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