Open Access

Table 1

Layer structure and thicknesses of the CuGaSe2 top cells: standard structure of the initial stack (J) compared to theoretically optimized structure and stepwise adaptation of the latter one in the experiment by stacks (A) to (C).

layer initial optim. optim. optim. optim.
thickness stack stack stack stack stack
( nm) (J) theory exp. (A) exp. (B) exp. (C)

MgF2 0 120 0 0 0

ZnO:Al 455 90 455 105 105
i-ZnO 95 50 95 50 50
CdS 50 65 50 50 50

CuGaSe2 1600 1050 1190 1190 1190

SnO2:F or 835 90 835 835
ZnO:Al 105

substrate glass CdS glass glass glass

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