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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