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US 9,312,042 B2Granted
Metal seed layer for solar cell conductive contact
AssigneeSunPower Corporation
InventorsRichard Hamilton Sewell, Jacob Huffman Woodruff
Life of this patent
Estimating the term…
Abstract
Metal seed layers for solar cell conductive contacts and methods of forming metal seed layers for solar cell conductive contacts are described. For example, a solar cell includes a substrate. A semiconductor region is disposed in or above the substrate. A conductive contact is disposed on the semiconductor region and includes a seed layer in contact with the semiconductor region. The seed layer is composed of aluminum (Al) and a second, different, metal.
Claims8
A solar cell, comprising:
- a substrate;
- a semiconductor region disposed in or above the substrate;
- and
- a conductive contact disposed on the semiconductor region and comprising a seed layer in contact with the semiconductor region, the seed layer comprising aluminum (Al) and a second, different, metal;
- wherein the second metal is magnesium (Mg), at least a portion of which is in the form of MgAl2O4.
2 more elements
A back contact solar cell, comprising:
- a substrate;
- a semiconductor region disposed in or above the substrate;
- a conductive contact disposed on the semiconductor region and comprising a seed layer in contact with the semiconductor region, the seed layer comprising aluminum (Al) and a second metal selected from the group consisting of magnesium (Mg), tin (Sn) and zinc (Zn), wherein the Al is in the form of Al/silicon (Al/Si) particles, and wherein the conductive contact further comprises a first metal layer disposed on the seed layer and a second metal layer disposed on the first metal layer;
- wherein the seed layer further comprises germanium (Ge).
1 more element
Dependencies are inferred from the claim text.