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Current issue

ELEKTRO 7/2018 was released on June 27th 2018. Its digital version will be available on July 27th 2018.

Topic: Cables, conductors and cable engineering; Tools, equipment and accessories for work with cables

Main Article
Parametrization of circuit models of Li-accumulators for electromobility
Smart Cities (part 3 – volume 1)

SVĚTLO (Light) 4/2018 was released on July 30th 2018. Its digital version will be available on August 31th 2018.

Refreshing our memory
Eccentric luminaires of René Roubíček from the years1965 till 1977
Bases of photometry – 1st part
Great personage of Czech science of times after Battle at Bílá hora: doctor, naturalist, philosopher and physicist Jan Marek Marci from Kronland

Optical radiation effects and use
The light and circadian rhythms

Non-toxic alternative for next-generation solar cells

18.07.2017 | University of Cambridge | www.cam.ac.uk

The team of researchers, from the University of Cambridge and the United States, have used theoretical and experimental methods to show how bismuth – the so-called “green element” which sits next to lead on the periodic table, could be used in low-cost solar cells.

Their results, reported in the journal Advanced Materials, suggest that solar cells incorporating bismuth can replicate the properties that enable the exceptional properties of lead-based solar cells, but without the same toxicity concerns. Later calculations by another research group showed that bismuth-based cells can convert light into energy at efficiencies up to 22%, which is comparable to the most advanced solar cells currently on the market.

Non-toxic solar cells

“We wanted to find out why defects don’t appear to affect the performance of lead-halide perovskite solar cells as much as they would in other materials,” said Dr Robert Hoye of Cambridge’s Cavendish Laboratory and Department of Materials Science & Metallurgy, and the paper’s lead author. “If we can figure out what’s special about them, then perhaps we can replicate their properties using non-toxic materials.”

Read more at University of Cambridge

Image Credit: University of Cambridge

-jk-