A kind of solar cell and preparation method thereof
A technology of solar cells and battery materials, applied in the field of solar cells, can solve problems such as insufficient power-to-weight ratio, easy-to-split yield, etc., and achieve the effects of reducing manufacturing costs, reducing the risk of splitting, and reducing usage
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[0100] This embodiment prepares a kind of solar cell, specifically comprises the following steps:
[0101] S1. Epitaxially growing a sacrificial layer on the first substrate, the material of the sacrificial layer is AlAs, and the thickness is 10 nm;
[0102] S2. On the surface of the sacrificial layer far away from the first substrate, a battery material layer 4 is arranged. The battery material layer 4 includes an n-GaAs layer, a GaInP battery layer, a tunnel junction, and a GaAs battery layer that are epitaxially grown in sequence starting from the surface of the sacrificial layer. , GaInP cut-off layer and p-GaAs layer;
[0103] S3. On the surface of the battery material layer 4 away from the first substrate, electron beam evaporation is used to arrange a back metal layer 3 with a total thickness of 3um. The back metal layer 3 is a composite layer formed by a Ni layer and an Au layer, wherein Ni Thickness 1um, Au thickness 2um;
[0104] S4. On the surface of the back meta...
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