Investigation of Al-Doped Emitter on N-Type Rear Junction Solar Cells

This brief models the junction discontinuities of a rear Al-doped p
⁺
emitter (np
⁺
) formed by screen printing and firing. Theoretical fitting of the suns-
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data to the circuit model shows that not only do the junction discontinuities deteriorate cell
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, for the case of p-type cells, but they also reduce cell fill factor on n-type cells through increased junction recombination and nonlinear shunts.