Proceedings of nanoGe September Meeting 2015 (NFM15)
Publication date: 8th June 2015
Copper-doped semiconductors are classic phosphor materials that have been used in a variety of applications for nearly a century. Recently, attention has turned to the development of colloidal copper-doped semiconductor nanocrystals, which combine the unique luminescence properties of copper-doped semiconductors with the solubility and optoelectronic tunability of semiconductor nanocrystals. Similar to their bulk counterparts, photoluminescence (PL) in copper-doped semiconductor nanocrystals originates from a charge transfer transition involving an electron in the condution band and a (formally) Cu2+ ion that is generated upon trapping of the photogenerated hole by a Cu+ dopant. This recombination mechanism results in a broad PL spectrum that is significantly lower in energy than the semiconductor band gap, and tunable by varying the size and composition of the nanocrystal. This tunability, combined with the minimal overlap of their absorption and PL spectra, makes copper-doped semiconductor nanocrystals attractive phosphors for numerous applications in optical imaging and spectral conversion. To optimize these materials as phosphors, it is important to understand their electronic structures and photophysical properties in detail. This talk will present data from a combination of optical and magnetooptical measurements and electronic structure calculations investigating the spectroscopic properties of copper-doped semiconductor nanocrystals. These data elucidate details of the electronic structures of these materials, with particular focus on the properties of the luminescent excited state in various copper-doped lattices.
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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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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.
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