Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)
Publication date: 6th February 2020
Organic-inorganic halide perovskites, with their ease of fabrication and bandgap-tunability, provide promising prospects in photovoltaic and light-emitting diode applications. While such materials are highly tolerant of defects, the presence of ionic, along with electronic, charge conduction can result in dynamic optoelectronic properties. In this work, we aim at understanding the charge recombination pathways in defect-engineered perovskites. Point defects are intentionally and controllably introduced into the lattice of methylammonium lead iodide (MAPbI3), and the corresponding impacts to optoelectronic properties are systematically investigated. By manipulating the lattice strain, a series of thin films with tunable bandgaps from 1.60 – 1.85 eV are fabricated. In addition to the concentrations and energetic positions of defects, which are quantified by photothermal deflection spectroscopy, the effects of these defects on photoluminescence yield are studied by steady-state and time-resolved fluorescence techniques. This work not only sheds light on the interactions between organics cations and the inorganic lattice, the results also provide insights into the factors that underlie defect tolerance in hybrid halide perovskite semiconductors.
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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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