Simultaneous production of differently doped areas on a solar cell using borosilicate glass

When producing rear contact solar cells, both negatively and positively doped areas need to be produced on the rear of the solar cell. Moreover, the front side of the solar cell has to be sufficiently passivated in order to minimize surface recombination. This means three differently doped areas are required.
Scientists of the University of Konstanz have now developed a new method for producing these three areas in a single diffusion step. This approach is based on the application of a borosilicate glass layer and partial silicon nitride masking on the rear of the solar cell.

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