Figure 6. Characterization of large scale NSP solar cell fabricated by roll-to-roll method.

(a) Large scale a-Si solar cell fabricated by roll-to-roll method and the inset shows the SEM micrograph of the surface. (b) J-V characteristic of large scale NSP and planar device. (c) Relative efficiency variation at different bending angle and the inset shows the schematic of defining bending angle. (d) Relative efficiency variation after bending cycle N to the initial efficiency and inset shows the measurement setup with bending.