Rapid Processing for Perovskite Solar Cells: Control of the Perovskite Intermediate Phases from Solution to Crystal Growth
Sandy Sanchez a, Anders Hagfeldt a
a Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, Switzerland
Oral, Sandy Sanchez, presentation 054
DOI: https://doi.org/10.29363/nanoge.nipho.2020.054
Publication date: 25th November 2019

For successful commercialization of perovskite solar cells, straightforward solutions in terms of environmental impact and economic feasibility are still required. Flash Infrared Annealing (FIRA) is a rapid method to fabricate perovskite solar cells with efficiencies > 20 % on regular architectures which allows a film synthesis in less than 2 seconds1, 2. By varying the FIRA parameters, it is possible to create high quality films of both fully inorganic and hybrid perovskites. This demonstrates the versatility of the FIRA protocol and establishes it as a fast synthesis process, which provides detailed control over the perovskite morphology and crystallinity.To make FIRA effective is necessary to understand the physicochemical phenomena that take place during the crystallization of the synthesized film. Is important, for example, to know the pathways of the nucleation and crystal growth through intermediate phases. In FIRA the crystallization occurs by it intermediate phases until the final crystal phase as it happens on the antisolvent method and posterior thermal low temperature annealing.

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