Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP24)
DOI: https://doi.org/10.29363/nanoge.iperop.2024.043
Publication date: 18th October 2023
Metal halide perovskite (PSC) solar cells are emerging with the promise of bringing about a revolution in the solar photovoltaic industry, as their efficiencies are now comparable to those of silicon. This fantastic result was only possible due to precise control and engineering of the morphology, interfaces and the use of multiple cations in the perovskite's A site, such as Rb, Cs, MA (methylammonium) and FA (formamidinium). For tandem perovskite solar cells, a mixture of different anions such as Br and I is also desired to tune the band gap. Such a cocktail of different cations and anions influences the formation of intermediates, new phases, favors the homogenization of halides, etc.; so that in the end, the efficiency of the device is closely related not only to the optical quality of the film, but also to the morphology and composition. We cannot forget how such a multicomponent system also influences degradation mechanisms (still the main problem for PSC!)
In this presentation, we will summarize important results from our group using in situ experiments to probe halide perovskite formation (2D and 3D), crystallization, composition, and stability. We employed several synchrotron techniques as time-resolved grazing incidence wide angle X-ray scattering (GIWAXS), small angle X-ray scattering (SAXS), high-resolution XRD and nano-infrared taken at the Brazilian Synchrotron National Laboratory, SSRL-Stanford and ALS Berkeley.
In situ GIWAXS experiments allowed us to understand the influence of the relative humidity and time to drop the antisolvent during the preparation of perovskite films [1], type of the solvent and deposition method [2] and the influence of additives [3]. It is well known that a 2D layer on the top of a 3D bulk perovskite improves stability and performance. In situ GIWAXS revealed us that during thermal annealing the 2D layer transforms itself into a disorder layer, improving hole transfer and stability [4]. Ex situ and in situ PL spectroscopies acquired during the formation and annealing of such 2D/3D interface showed us the importance of the chemical structure of the long organic cation on formation dynamics and final composition [5].
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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.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.