Fig. 4
From: Orthogonal Thin Film Photovoltaics on Vertical Nanostructures
Simulated variation in the a open circuit voltage, b short circuit current, c fill factor, and d maximum power output with the orthogonal solar cell pillar height, normalized with respect to a planar solar cell. A reduction in the VOC and FF and increase in the ISC, with pillar height increase, lead to an optimum pillar height for the highest efficiency gain. However, this gain is diminished for solar cells with a dominant recombination effect where the variation in device characteristics with illumination is the largest. These points to the critical role that recombination carrier losses play in orthogonal solar cells. This suggests that the orthogonal solar cells are better suited for devices with minimal recombination losses