Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
DOI: https://doi.org/10.29363/nanoge.hopv.2023.190
Publication date: 30th March 2023
The crystallisation pathway of metal halide perovskites from solution significantly impacts optoelectronic quality, defect formation and stability in the formed materials. While many crystalline intermediates - such as solvate and polytype phases - have been identified for typical Pb-based and I-rich compositions, much remains to be uncovered about the effect of cation, metal and halide composition on phase growth. Here we present a holistic understanding of perovskite crystallisation across a wide range of compositions and bandgaps relevant for tandem applications, and also address the role of additives in secondary phase formation.[1][2] Principally we investigate perovskite materials deposited by blade-coating and monitored using synchrotron-based in situ grazing-incidence wide-angle X-ray scattering (GIWAXS). By means of a selection of solution characterisation methods, including nuclear magnetic resonance (NMR) spectroscopy, we establish a clear understanding of the bridge between solution chemistry, precursor phase formation and resulting material properties across the entire range of PV-relevant perovskite compositions. Our work provides important insights into the controlled growth of stable perovskite materials by understanding and manipulating the crystallisation pathway.
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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.
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