Do flexible solar cells degrade after bending?

It was usually observed in reported papers that when flexible solar cells were prepared on ITO electrodes, they degraded after bending with radius of 4 mm or even lower, [51, 52] not to mention the folding process. Thus, flexible transparent electrodes as alternatives is important for realizing foldable solar cells.

Does flexible photovoltaic bending affect PCE performance?

For flexible photovoltaics, the bending and stretching of the device should not have a notable impact on PCE [ 71]. Currently, the dominant TF flexible photovoltaic suffers from rapid performance degradation during continuous bending.

What is the bending speed of a 60 m flexible SHJ solar cell?

The edge of a 60-μm flexible SHJ solar cell was folded to touch the opposite edge; this bending was maintained for more than 10 s. The bending speed was approximately 1,000 mm min−1. The Jsc, Voc, FF and PCE of this cell were tested with a solar simulator during 1,000 bending cycles under standard illumination of 100 mW cm−2at 25 °C.

Are flexible perovskite solar cells bending?

Here, two-dimensional models of flexible perovskite solar cells have been performed to reveal the effect of bending angles and directions for the first time. Simulated results are in good agreement with experimentally reported data, validating the accuracy of our model.

Does bending affect photovoltaic performance?

Our results verify the experimental reports, the η still maintains 95.12 % of the initial value in FPSC when bent to 90°. However, the bending direction generates a huge difference in photovoltaic performance. Bending up is 9.9 % higher than bending down in current density.

What is the deformation of flexible solar cells?

The deformation of flexible solar cells mainly includes bending, folding, stretching, twisting and crumpling (Figure 1). It is widely accepted that folding is the extreme condition of bending which generating crease with extreme low curvature radius of sub-millimeter.