Patent ID: 11935972
Assignee: MAXEON SOLAR PTE. LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 8:
9. A solar cell, comprising:
a first dielectric layer disposed on a back surface of a substrate;
a semiconductor stack disposed on the first dielectric layer such that the first dielectric layer is vertically between the back surface of the substrate and the semiconductor stack, wherein the semiconductor stack comprises a stack of three or more distinct semiconductor layers;
a second dielectric layer disposed on the back surface of the substrate;
a polycrystalline silicon emitter region disposed on the second dielectric layer;
a first conductive contact structure disposed on the semiconductor stack; and
a second conductive contact structure disposed on the polycrystalline silicon emitter region, wherein the polycrystalline silicon emitter region overlaps the semiconductor stack.