Design, fabrication and characterization of titanium metallic hollow fiber organic perovskite solar cells

Optimizing structural design improves light capture ability of the solar cell. In this work, we design and prepare the hollow fiber solar cellswith structure of titanium/dense titania/mesoporous titania+organic perovskite/hole transport layer/polymer transparent electrode layer. The analyses of photocurrent and photovoltage of the solar cell under different light intensity shows that the hollow fiber structured solar cells have higher light trapping ability comparing with the planar solar cells. The illumination intensity increases logarithmically within 0-20 000 lux. With parallel light incidence, the photocurrent and voltage of the hollow fiber solar cell reach higher values when the incident angle remains in the range of 30°-50°.