Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)
Publication date: 6th February 2020
Perovskite solar cells have become a hot research topic.[1] To now, most of the published works used three-dimensional (3D) perovskite materials (such as MAPbI3) as the light absorber. Recently, researchers paid more and more attention to 2D perovskite materials due to the better stability and other interesting properties of 2D perovskites. The 2D perovskites were made by inserting some larger organic cations (such as phenylethylammonium or butylammonium ions) into the 3D perovskites to form a 2D layered structure. The orientation of the 2D perovskite crystal has significant effect on the performance of 2D perovskite solar cells. People usually used the hot-casting method or by adding additives to control the orientation and improve the device performance.
In this presentation, we will present a simple, readily scalable drop-casting method for preparing 2D perovskite films.[2] The 2D perovskite solution can spread and form a film automatically after dropping the perovskite solution onto preheated substrates. The 2D perovskite films are highly oriented, smooth, and uniform. We obtained a best power conversion of 14.9%, which is the highest reported to date for 2D-perovksite solar cells with (BA)2(MA)3Pb4I13 absorber. The slot-die coating onto glass substrate and R2R deposition onto a flexible plastic substrate were then investigated. The 3D perovskites need antisolvent or N2 quenching to form good films.[3] We found that the 2D perovskite can form high-quality films without using the quenching in the slot-die coating process. We think this novel scalable deposition process is promising to be used in large-scale production. The high-quality 2D perovskite films may also be used in other optoelectronic devices.
The authors acknowledge support from the Australian Centre for Advanced Photovoltaics (ACAP) program funded by the Australian Government through the Australian Renewable Energy Agency (ARENA), the Industrial Innovation Program of CSIRO Manufacturing, and a CSIRO Post-doctoral Fellowship (D.A.). C.Z. and L.D. acknowledge support from the National Natural Science Foundation of China (51503050 and 51773045). The authors also acknowledge Dr Aaron Seeber of CSIRO for XRD measurements. Part of this work was conducted on the SAXS/WAXS beamline at the Australian Synchrotron, part of ANSTO.
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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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