Proceedings of September Meeting 2016 (NFM16)
Publication date: 14th June 2016
Perovskite nanocrystals (NCs) are the newest extension to the fascinating field of hybrid halide perovskites. Showing significantly enhanced photoluminescence (PL) efficiency and emission wavelengths tunable through halide content and size, they hold great promise for light-emitting applications. Despite the rapid advancement in this field, the physical nature as well as size-dependent excitonic properties have not been well investigated due to the challenges associated with their preparation.
We focus on fabricating lead halide perovskites with controlled dimensionality, size and composition and on studying the optical and electrical properties of the resulting nanocrystals. By employing different organic cations, we are able to fabricate two-dimensional nanoplatelets of thickness down to a single unit cell. This leads to a strong-quantum size effect in the perovskites and exciton binding energies of several hundreds of meV. We employ several fabrication techniques to increase the fluorescence quantum yield in order to investigate single particles, amplified spontaneous emission (ASE) and lasing, as well as to study energy transport between individual nanocrystals by time-resolved spectroscopic methods.
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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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