Fig. 5
From: Orthogonal Thin Film Photovoltaics on Vertical Nanostructures
a SEM image of solar cell with orthogonal pillars consisting of vertical array of CNT coated with a-Si:H solar cell. The size effect of the CNT leads to an electric field enhancement within the device. b Illustrates two different approaches for the device fabrication, namely coating the outer wall with a metallic film or relying on the doped semiconductor as a section of the electrode results in a differences in the electric field strength within the device