Document Type : Research
Authors
1 Department of Semiconductor, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran
2 Department of Physics, Yazd University, Yazd, Iran
3 Department of Fiber Optic, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran
Abstract
In this study, the effects of antisolvent treatment of the CH3NH3PbI3 perovskite layer with chlorobenzene at different times on the structural properties, stability, and photovoltaic performance of the mesoporous perovskite solar cell was investigated and analyzed. For this purpose, using X-ray diffraction characterization (XRD), water droplet contact angle, and current-voltage diagram, the structural parameters of the perovskite layer, including dislocation density, crystallite size, microstrain, crystal lattice constants, and unit cell volume, as well as the performance parameters of the perovskite solar cell, including current density, open circuit voltage, fill factor, efficiency, and environmental stability, were investigated. It was found that the parameters of crystallite size, dislocation density, microstrain, and lattice unit cell volume for the sample in which the chlorobenzene antisolvent was applied 10 seconds after the start of the deposition process were 56.71 nm, 3.11 × 10-4, 3.13 × 10-3, and 1016.5744 A˚3, respectively, which, compared to the values of the same parameters for the perovskite layer in which the antisolvent was applied 7 and 13 seconds after the start of the deposition process, indicated fewer lattice defects and higher crystallinity. Also, the perovskite solar cell of the sample with anti-solvent applied 10 seconds after the start of the deposition process showed an efficiency of 10.21%, which maintained 83% of its efficiency after 720 hours. The results of this research can be used in the manufacture of efficient and stable perovskite solar cells
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