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US 11,024,758 B2Granted
Layer structure for a thin-film solar cell and production method
AssigneeZentrum fuer Sonnenenergie- und Wasserstoff-Forschung Baden-Wuerttemberg
InventorsRoland Wuerz, Michael Powalla, Philip Jackson, Dimitrios Hariskos
Life of this patent
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Abstract
A layer structure for a thin-film solar cell and production method are provided. The layer structure for the thin-film solar cell includes a photovoltaic absorber layer doped, at least in a region which borders a surface of the photovoltaic absorber layer, with at least one alkali metal. The layer structure has an oxidic passivating layer on the surface of the photovoltaic absorber layer, which is designed to protect the photovoltaic absorber layer from corrosion.
Claims7
A layer structure for a thin-film solar cell, comprising:
- a photovoltaic absorber layer including a first region at a first end of the photovoltaic absorber layer that has been converted from a surface portion of the photovoltaic absorber layer into an oxidic passivating region and a second region at a second end of the photovoltaic absorber layer that is opposite from the first end, the photovoltaic absorber layer being doped, at least in the first region, with at least one alkali metal,
- wherein the oxidic passivating region is corrosion-resistant, wherein
- the photovoltaic absorber layer comprises Cu(In1-xGax)(Se1-ySy)2, where 0≤x,y≤1, and Cu2ZnSn(Se1-xSx)4, where 0≤x≤1, and the oxidic passivating region further comprises at least one of (In,Ga)2O3 and Mx(In,Ga)yOz, where M=K, Rb, Cs and where 0<x, y, z, or
- the photovoltaic absorber layer comprises Cu2ZnSn(Se1-xSx)4, where 0≤x≤1, and the oxidic passivating region further comprises SnOx, where x=1 to 2.
1 more element
Dependencies are inferred from the claim text.