Minimum bending radius of flexible photovoltaic panels

Does bending test affect photovoltaic characteristics under 40 mm and 32 mm bend radius?

Effect of photovoltaic characteristics under 40 mm and 32 mm bend radius are revealed. Performances were compared to the measurements in a planar state before and after bending test. The impact of bending test on EQE, C-V and residual stress measurements were analysed.

Does bend radius affect PV performance when flexed?

Little has been reported on the effects on PV performance when flexed, so we investigated the effects on J-V parameters when the measurements were performed in 40 mm and 32 mm bend radius, and in a planar state before and after the bend curvature was applied.

Which electrode configuration is best for bending a solar cell?

For instance, devices with a sandwich electrode configuration (in thin-film solar cells, with transparent conducting oxides, and a large active area with negligible border-effect photogeneration), should maintain operational performance for more bending cycles in the parallel than in the perpendicular orientation.

What are the error bars in a solar cell bending test?

The error bars are the standard deviation of the 8 solar cells. In addition, a static 32 mm bending test was performed for 168 h (Fig. 4). The J-V was measured before and after bending and in 32 mm bend radius at 0, 24, 48, 120, 144 and 168 h.

Is bending a reversible degradation induced by solar cells?

The degradation induced by bending was irreversible when the sample was reset into planar state . Rance et al. produced CdTe on Corning Willow Glass™ and the solar cells efficiency was measured in the flexed and flat state. It was demonstrated that a bend radius of 51 mm can be achieved without decreasing device performance .

Are bending tests a primary metric for mechanical robustness in PV cells?

Importantly, the bending tests are a primary metric for mechanical robustness, and the recommendations in this Perspective provide a fundamental starting point for the systematic characterization of mechanical device performance in PV cells.