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- W3171445812 abstract "Low-cost aluminum (Al) metallization process on p + side of n-type silicon (Si) substrate with low recombination current density ( J 0met ) is presented. Narrow-line Al screen-printed fingers on symmetrically passivated p + -n-p + Si precursors with local contact opening (LCO) are investigated. The Si content of the Al pastes, LCO patterns and Al finger widths are varied to evaluate the formation quality of the Al-doped p + region. By increasing the pitch distance of the dot-shaped LCOs, the inverted pyramid cavities are found after removing the Al-Si eutectic part by HCl. The tendency of the reaction during the sintering process is controlled by fritting the Al paste with Si, which allows a faster Si saturation in the paste matrix and facilitates faster return of Si to the LCO region. With a combination of narrow-line fingers of 90 μm and a dot-shaped LCO pitch of 140 μm, J 0met value of 420 fA/cm 2 is realized. • Screen-printed narrow-line Al paste application for Si solar cells front side. • Local-contact-opening (LCO) pitches and Al finger affect quality of Al- p + region. • Recombination current density under the Al contact ( J 0met ) be reduced by Al-Si paste. • Optimized the combination of Si ratio in Al paste and LCO pitches for lower J 0met . • Combination of narrow Al-Si fingers and dots LCO, the J 0met shows around 500 fA/cm 2 ." @default.
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- W3171445812 date "2021-09-01" @default.
- W3171445812 modified "2023-10-18" @default.
- W3171445812 title "Contact control of Al/Si interface of Si solar cells by local contact opening method" @default.
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- W3171445812 doi "https://doi.org/10.1016/j.matchemphys.2021.124833" @default.
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