Cell types and contact strips used in the small modules. The first column shows pictures of the front and back side of the cells used. Symbols: d, thickness of the coating of the contact strips. T,W, thickness and width of the contact strips, respectively. N, how many contact strips were used between two neighbouring cells. Rs,in, initial series resistance, determined from a fit of the theoretical IV-curve of the one-diode model to the data of the IV curves measured right after production of the modules. *, “tinned iron”, a core of Fe with a thin layer of Sn, whose thickness was below 1 μm.
|Module||Contact strips||Rs,in||Number of|
|Cell type||name||Coating d [μm]||T × W||N||[mΩ]||temperature|
|Standard||S1||SnPbAg||15||0.15 × 2.5||2||193||760|
|S2||SnPbAg||15||0.20 × 2.0||2||80||760|
|S3||Cu||0.20 × 2.5||2||165||796|
|S4||Ag||~1||0.30 × 2.2||2||95||546|
|QuarterCell K||K1||Ag||6.5||0.19 × 5.0||4||114||1006|
|K2||Ag||6.5||0.19 × 5.0||4||92||1006|
|K3||Ag||6.5||0.25 × 5.0||3||113||493|
|K4||Ag||~1||0.30 × 2.2||3||296||546|
|K5||Cu||0.20 × 5.0||3||226||796|
|QuarterCell P||P1||SnPbAg||6.5||0.05 × 3.5||7||65||685|
|P2||SnPbAg||6.5||0.05 × 3.5||7||66||685|
|P3||Ag||6.5||0.05 × 5.0||7||44||685|
|P4||Ag||6.5||0.05 × 5.0||7||54||685|
|P5||Ag||6.5||0.19 × 2.5||3||36||796|
|P6||Sn on Fe*||< 1||0.20 × 2.0||3||129||350|
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