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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

Our NanoNews Digest Sponsors 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 the market. Moreover,

Autonomes Fahren: Sensoren lösen endlich fatales Problem

Autonomes Fahren: Sensoren lösen endlich fatales Problem
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Matters of communication: Handelsblatting the Oxford-AstraZeneca vaccine - On Line Opinion

The Oxford-AstraZeneca COVID-19 vaccine is fast becoming a subject of notoriety. First, will States obtain it? Second, will they use it? The first answer has generally been affirmative, given the vaccine s ease of storage and relative cheapness. The second is becoming increasingly difficult. Orders have been made and supplies – some of them anyway - furnished, but vials and batches are not being used. Countries are either restricting or suspending the jab. AstraZeneca finds itself mounting what can only be a round-the-clock communications battle trying to dissuade officials not to put the brakes on. Various artillery pieces have been marshalled against it. In late January, French President Emmanuel Macron expressed disappointment with the vaccine a mere few hours before the European Medicines Agency (EMA) approved its use on all adults. The real problem on AstraZeneca is that it doesn t work the way we were expecting it to, he told press members. We re waiting for the EMA resu

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