Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
In this presentation, we report an efficient method to adjust the compositions of CH3NH3PbI3 perovskite by controlling the working pressure of CH3NH3I and its effects on perovskite films in a vacuum co-deposition process. Thermal heating of the CH3NH3I source in a vacuum chamber increases the working pressure, which can be an indicator for the control of the ratio of CH3NH3I for perovskite in the vacuum thermal co-deposition process. Under the different working pressures with the fixed deposition rate of PbI2, the physical properties of the films, such as thicknesses, absorbances, XRD spectra, morphologies, device performances and compositions differed significantly. At the optimum working pressure, the perovskite solar cell fabricated using an all-vacuum process showed a maximum power conversion efficiency of 14.5% with high reproducibility, implying successful formation of the film using the pressure-controlled vacuum co-deposition. These results will provide a useful guide for the fabrication of perovskite films using the vacuum co-deposition process.
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International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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