Fig. 3 | Nature Communications

Fig. 3

From: Flexible Cu2ZnSn(S,Se)4 solar cells with over 10% efficiency and methods of enlarging the cell area

Fig. 3

Photovoltaic device properties of flexible CZTSSe3-L and CZTSSe7-L. a 1 cell with a size of ~15 mm × 15 mm is included in the Mo foil substrate with a size of ~25 mm × 25 mm and b flexed sample image. All samples are with cell areas larger than 2 cm2 for 9 devices of each type. c Current density-voltage curves, d EQE curves at a bias of 0 V, and e calculated bandgaps of CZTSSe3-L and CZTSSe7-L samples with the highest efficiencies (from KIER certificate, Supplementary Figs. 7g, h, and 8m, n). f The average efficiency values are 6.77% with a StDev of 1.34 for CZTSSe3-L and 8.07% with a StDev of 0.48 for CZTSSe7-L. g The average VOC values are 0.485 V with a StDev of 0.038 for CZTSSe3-L and 0.524 V with a StDev of 0.011 for CZTSSe7-L. h The average JSC values are 31.44 mA cm−2 with a StDev of 0.91 for CZTSSe3-L and 32.57 mA cm−2 with a StDev of 0.44 for CZTSSe7-L. i The average FF values are 44.01% with a StDev of 4.60 for CZTSSe3-L and 47.23% with a StDev of 2.51 for CZTSSe7-L. j The average Rs values are 3.0 Ω cm2 with a StDev of 0.5 for CZTSSe3-L and 2.7 Ω cm2 with a StDev of 0.3 for CZTSSe7-L. k The average Rsh values are 93.5 Ω cm2 with a StDev of 55.0 for CZTSSe3-L and 200.7 Ω cm2 with a StDev of 60.0 for CZTSSe7-L. l The average VOC deficit (Eg/qVOC) values are 0.669 V with a StDev of 0.045 for CZTSSe3-L and 0.615 V with a StDev of 0.012 for CZTSSe7-L

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