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Current issue

ELEKTRO 7/2020 was released on June 24th 2020. Its digital version will be available on July 24th 2020.

Topic: Cables, conductors and cable engineering

Main Article
New traction power supply technology 25 kV/50 Hz (part 2)

SVĚTLO (Light) 3/2020 was released on June 8th 2020. Its digital version will be available on July 8th 2020.

Professional organizations activities
Announcement: LUMEN V4 2020 is cancelled
What is new in CIE, April 2020

Accessories of lighting installations
Foxtrot as a “Master Control” in Hotel Breukelen
Lighting regulators – control of lighting on the constant level

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