Abstract
Flexible solar cells have drawn wide attention because of their high photoelectric conversion efficiency, convenient preparation, excellent bendability and lower cost advantages. This paper introduces the effect of mesoporous layer on the morphology of CH3NH3PbI3 films. The uniformity and optical transmittance of the different films were also studied in detail. By adjusting the ratio of TiO2 and ZrO2, mesoporous structure of CH3NH3PbI3 perovskite solar cells were prepared by two-step spin coating. The fabricated films were investigated by XRD, SEM and spectrophotometer. The results indicate that perovskite layers have good surface morphology, density and coverage with TiO2 and ZrO2 composition ratio of 1:1. These well-structured thin films lay a good foundation for the preparation of high performance flexible perovskite solar cells.
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