Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
In literature, the effect of exposure of a perovskite film to moisture, and its beneficial effect on the perovskite layer for solar cell performance has been reported on multiple occasions. In this research we use a mixture of lead sources in the perovskite precursor solution in order to produce the perovskite film. The benefit of this type of precursor solution is that the perovskite solar cell performance can predictably be changed by altering the concentration and ratios of organic to inorganic and ratios of the different lead sources. Giving us excellent control over the perovskite films we produce. Using this precursor solution in our planar device stack, we have found the same dependence of perovskite solar cell performance on the exposure to moisture (air) during the annealing process of our produced perovskite films. In order to get a better understanding of the role of moisture on the electrical properties of the perovskite film, and to see if moisture is really the only thing that is improving these properties, we have designed an experiment in which we compare the solar cell performances of perovskite solar cells that were annealed in different atmospheres.We have produced the perovskite layers inside a dry, nitrogen filled glovebox and annealed them in a dry nitrogen atmosphere (glovebox), a wet nitrogen atmosphere (glovebox with humidity control, set to 47& R.H.) and air (47% R.H. and 22,7°C) for different amounts of time.We have found that the cells that were annealed inside a dry glovebox performed the worst (6.9% – 9.5), the ones annealed in air performed the best (11.3% – 13.4%), and the ones annealed in a wet nitrogen atmosphere performed better than those annealed in a dry nitrogen atmosphere, but were still lacking current and voltage compared to those annealed in air (9.5% – 12.4%). This has led us to believe that there is another factor present that is beneficial to the electrical performance of the perovskite film in a solar cell. We are currently investigating what this additional cause for improvement could be and hope to come up with an answer soon.
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International Conference on Hybrid and Organic Photovoltaics
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.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
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