Proceedings of nanoGe Fall Meeting 2021 (NFM21)
DOI: https://doi.org/10.29363/nanoge.nfm.2021.190
Publication date: 23rd September 2021
The high-efficiency perovskite solar cells (PSCs) are mostly fabricated in a glovebox under controlled inert environments.[1] Even though there are many advancements have been made in the PSCs, it still limits the operational longevity under ambient atmospheric conditions. The formamidinium lead iodide (FAPI) perovskite, is the most appealing Pb-based 3D halide perovskite for solar cell application because of its narrow bandgap.[1,2] However, the FAPI perovskite a-black phase is not stable at room temperature and is challenging to stabilize in an ambient environment due to its thermodynamic stability limitation.[2] We show that pure FAPI PSCs show significantly higher stability when prepared under ambient air compared to FAPI PSCs fabricated under nitrogen. The concomitant use of the N-methylpyrrolidone (NMP) and the preparation under air conditions is demonstrated as an effective combination to structurally stabilize the a-phase of the material and to improve the film quality, which is handled in the air for the fabrication of the solar cell. However, the most dramatic change observed among cells fabricated in a different environment is in the long term stability of unencapsulated devices where the T80 parameter, increases from 21 (in N2) to 112 days (in ambient) to 145 days if PbS quantum dots (QDs) are introduced as additives in air-prepared FAPI PSCs.[3] Furthermore, by adding methylammonium chloride (MACl) the PCE reaches 19.4% and devices maintain 100% of the original performance during two months of storage at ambient conditions. The increase of stability for air fabricated FAPI PSCs is correlated to the presence of Pb-O bonds only in the FAPI films prepared in ambient conditions, thus opening the way to a new strategy for the stabilization in the air towards perovskite solar cells commercialization.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
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.