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Renewable energies: No wind turbine disturbing the scenery

Renewable energies: No wind turbine disturbing the scenery
eurekalert.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from eurekalert.org Daily Mail and Mail on Sunday newspapers.

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Sustainable electricity generation at low temperatures

Credit: Markus Breig/Amadeus Bramsiepe, KIT
Low-temperature heat in the form of waste heat from industry or geothermal power plants offers big potential for sustainable and need-tailored power supply. The Modular Low-temperature Cycle Karlsruhe (MoNiKa), the only research facility of this kind in Europe, has now started operation at Karlsruhe Institute of Technology (KIT). Work is aimed at enhancing efficiency and environmental compatibility of the conversion of excessive heat into electric power by means of the organic Rankine cycle (ORC).
In the past years, low-temperature heat gained importance for efficient electricity generation with low CO2 emissions. Instead of releasing excessive heat into the environment, it makes more sense to use it and to produce electricity from it, says Dr. Dietmar Kuhn, Head of the Energy and Process Engineering Group of KIT s Institute for Thermal Energy Technology and Safety (ITES). So-called ORC facilities are used to convert heat with ....

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Anti-reflective films: What high-tech can learn from plants

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IMAGE: Solar modules without (left) and with (right; visualized) Phytonics film. The film almost completely suppresses reflection for all wavelengths and angles of incidence of light.
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Credit: Photos by Andrea Fabry; Editing by Phytonics
The high-tech company Phytonics, a spinoff from the Karlsruhe Institute of Technology (KIT), gets inspired by plants: The Phytonics film with micro- and nanostructures modeled on rose petals provides an anti-reflective coating for all kinds of surfaces, makes solar modules up to ten percent more efficient, and gives many objects a noble velvety appearance. At the Hannover Messe 2021 from April 12 to 16, the innovation will be showcased at KIT s virtual booth Future Hub. ....

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A molecule that responds to light

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IMAGE: Based on the Europium(III) scientists aim to advance the development of Quantum Computers.
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Credit: S. Kuppusamy, KIT
Light can be used to operate quantum information processing systems, e.g. quantum computers, quickly and efficiently. Researchers at Karlsruhe Institute of Technology (KIT) and Chimie ParisTech/CNRS have now significantly advanced the development of molecule-based materials suitable for use as light-addressable fundamental quantum units. As they report in the journal
Nature Communications, they have demonstrated for the first time the possibility of addressing nuclear spin levels of a molecular complex of europium(III) rare-earth ions with light. (DOI: 10.1038/s41467-021-22383-x) ....

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Nanotechnology Now - Press Release: Shedding light on perovskite films: Efficient materials for future solar cells - New model to determine photoluminescence quantum efficiency

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Home > Press > Shedding light on perovskite films: Efficient materials for future solar cells - New model to determine photoluminescence quantum efficiency
In terms of efficiency, perovskite solar cells have caught up on silicon solar cells, but some of their properties are not yet understood completely.
CREDIT
Markus Breig, KIT
Abstract:
Photovoltaics decisively contributes to sustainable energy supply. The efficiency of solar cells in directly converting light energy into electrical energy depends on the material used. Metal-halide perovskites are considered very promising materials for solar cells of the next generation. With these semiconductors named after their special crystal structure, a considerable increase in efficiency was achieved in the past years. Meanwhile, perovskite solar cells have reached an efficiency of up to 25.5 percent, which is quite close to that of silicon solar cells that are presently dominating t ....

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