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ELEKTRO 3/2018 was released on March 14th 2018. Its digital version will be available on March 14th 2018.

Topic: Amper 2018 – 26th International trade fair for electrical engineering

Main Article
Influence of magnetic storms on transformers of the power system

SVĚTLO (Light) 2/2018 was released on March 16th 2018. Its digital version will be available immediately.

Fairs and exhibitions
Interior elite again after year in Letňany

Luminaires and luminous apparatuses
Emergency lighting
The future of industrial lighting has name INNOVA
GOLY luminaire – the practical high bay luminaire
McLED® – brand name of first rate quality LED lighting
VOLGA EU luminaire our choice for Europe

Perovskite Solar Cells Surpass 20% Efficiency

15.06.2016 | Ecole polytechnique fédérale de Lausanneg | actu.epfl.ch

Michael Graetzel and his team found that, by briefly reducing the pressure while fabricating perovskite crystals, they were able to achieve the highest performance ever measured for larger-size perovskite solar cells, reaching over 20% efficiency and matching the performance of conventional thin-film solar cells of similar sizes.

This is promising news for perovskite technology that is already low cost and under industrial development.

New perovskites solar cells efficiency record

Layering perovskites on top of silicon to make hybrid solar panels may actually boost the silicon solar-cell industry. Efficiency could exceed 30%, with the theoretical limit being around 44%. The improved performance would come from harnessing more solar energy: the higher energy light would be absorbed by the perovskite top layer, while lower energy sunlight passing through the perovskite would be absorbed by the silicon layer.

Graetzel is known for his transparent dye-sensitized solar cells. It turns out that the first perovskite solar cells were dye-sensitized cells where the dye was replaced by small perovskite particles. His lab’s latest perovskite prototype, roughly the size of an SD card, looks like a piece of glass that is darkened on one side by a thin film of perovskite. Unlike the transparent dye-sensitized cells, the perovskite solar cell is opaque.

Read more at Ecole polytechnique fédérale de Lausanneg

Image Credit: Ecole polytechnique fédérale de Lausanneg