Science Daily August 14, 2023 Researchers in Switzerland developed chromium compounds, very similar to those used in the past, that can replace the noble metals osmium and ruthenium. When irradiated with a red lamp the new chromium compounds the energy from the light could be stored in molecules which could serve as power source. They demonstrated it by building the chromium compounds into a stiff organic molecular framework consisting of carbon, nitrogen, and hydrogen. The stiff framework ensured that the chromium atoms were well packaged. The tailor-made environment minimized energy losses due to undesired molecular vibrations and to optimize the […]
Tag Archives: Photoluminescence
Nanoantennas directing a bright future
Nanowerk December 21, 2022 Phosphor plates combined with nanoantenna, enable spatial and spectral control over luminescence. While the emission enhancement in a specific direction has been reported in nanoantenna studies, the evaluation of the total distribution of radiation as well as the conversion efficiency is largely missing. An international team of researchers (Japan, China) developed nanoantenna phosphors consist of a hexagonal array of titanium dioxide (TiO2) nanoparticles, fabricated on a phosphor plate of yttrium aluminum garnet doped with Ce3+ (YAG:Ce). They visualized the distribution of photoluminescence from the nanoantenna phosphor into forward, backward, and side directions by using an integrating […]