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During manufacturing of a CIGS device, the metal back contact is deposited first, while in case of the CdTe solar cells, the back contact is deposited in the last processing step. What are the configurations of both cells:

Both the CI(G)S and CdTe solar cells are made in superstrate stucture

The CI(G)S solar cell is made in a superstrate structure, whereas CdTe solar cell is made in a substrate structure

The CI(G)S solar cell is made in a substrate structure, whereas CdTe solar cell is made in a superstrate structure

Both CI(G)S and CdTe solar cells are made in substrate stucture.

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