Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
DOI: https://doi.org/10.29363/nanoge.hopv.2022.152
Publication date: 20th April 2022
Improving the stability of lead halide perovskite (LHP) solar cells is a major challenge towards their industrialization. Nowadays, most studies are focused on the impact of the environment on the device performances, like temperature sensitivity or photo-instability. However, an in-depth knowledge of internal degradation mechanisms is still lacking.
In this context, it has been shown that moisture induces changes in global Perovskite Solar Cell (PSC) performances. It comes with alterations of the absorber nature like phase transition or segregation. Understanding how the material evolves in a wet environment is mandatory to optimize device performances and stability. It requires advanced characterization techniques with nanoscale spatial resolution.
In the present work, we investigate the chemical and structural evolution of triple cation mixed halide perovskite thin-film (Cs0.05MA0.45FA0.5Pb(I0.83Br0.17)3) after ageing under controlled humidity. The analysis is performed at different scales, through Photolomuniscence (PL), X-ray Diffraction Spectroscopy (XRD), Cathodoluminescence (CL), Selected Area Diffraction (SAED), and Energy Dispersive X-ray Spectroscopy (EDS) in a SEM and a STEM. Special care was taken during specimen preparation and characterization to perform SEM-based (CL and EDS) and TEM-based (STEM-EDS and SAED) measurements in the same regions.
We correlate optical and chemical variations to morphological changes at a microscopic level from the analysis of the perovskite layer’s degradation products. We evidence the formation of lead-iodide (PbI2), inorganic mixed halide (CsPb(BrxI1-x)3) and lead-rich (CsPb2(BryI1-y)5) perovskite phases. They demonstrate a high degree of crystallinity that induces unique geometrical shapes. By correlating high-resolution characterizations techniques, we identify the precise nature of these specific species. This work provides insights in the degradation mechanisms of hybrid perovskite materials.
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.