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ELEKTRO 12/2021 was released on December 1st 2021. Its digital version will be available immediately.

Topic: Measurement, testing, quality care

Market, trade, business
What to keep in mind when changing energy providers

SVĚTLO (Light) 6/2021 was released 11.29.2021. Its digital version will be available immediately.

Fairs and exhibitions
Designblok, Prague International Design Festival 2021
Journal Světlo Competition about the best exhibit in branch of light and lighting at FOR ARCH and FOR INTERIOR fair

Professional literature
The new date format for luminaires description

All-perovskite tandem solar cells with 24.8% efficiency

9. 10. 2019 | Tech Xplore | www.techxplore.com

A team of researchers at Nanjing University in China and the University of Toronto in Canada have recently fabricated all-perovskite tandem solar cells (PSCs), a type of solar cell with a key perovskite structured component. These new solar cells, presented in a paper featured in Nature Energy, were achieve remarkable efficiency, outperforming other existing solutions.

Perovskites are a group of minerals that have the same crystal structure as perovskite, a yellow, brown or black mineral consisting largely of calcium titanate. Over the past few years, several research teams worldwide have been trying to develop solar cells using this material, typically utilizing either wide-bandgap (~1.8 eV) or narrow-bandgap (~1.2 eV) perovskites.

Perovskite solar cells

Fabricating all-perovskite tandem solar cells, thus combining wide-bandgap and narrow-bandgap perovskites together, could lead to a higher power conversion efficiency (PCEs) than that attained by single-junction cells without increasing fabrication costs. Researchers introduced a new chemical approach that could ultimately enhance the performance of PSCs. This approach is based on a comproportionation reaction that leads to substantial advancements in the charge carrier diffusion lengths of mixed Pb-Sn narrow-bandgap perovskites.

Read more at Tech Xplore

Image Credit: Nanjing University

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