Proceedings of International Conference on Perovskite Thin Film Photovoltaics and Perovskite Photonics and Optoelectronics (NIPHO20)
DOI: https://doi.org/10.29363/nanoge.nipho.2020.068
Publication date: 25th November 2019
Halide perovskite semiconductors exhibit a unique combination of very-low electronic defect density, self-healing properties, and low exciton binding. This set of properties is surprising for a solution-processed material and results in an excellent photovoltaic activity.
I will show that the fundamental property that sets the halide perovskites apart from conventional semiconductors like silicon and GaAs is strongly anharmonic lattice dynamics. Large amplitude, local polar fluctuations that, result from lattice anharmonicity, localize the electronic states and enhance the screening of electric charges within the material. In other words, in some aspects, halide perovskites behave more like a liquid than a crystalline solid.
First, I will show that anharmonic lattice dynamics in methylammonium lead bromide lead to strong changes in its dielectric response with temeparture. Then, I will discuss the benefits of Raman polarization-orientation measurements to investigate temperature-induced symmetry breaking. Finally, I will discuss in detail the mechanisms that lead to strong anharmonicity in methylammonium lead iodide.
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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.