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Current issue

ELEKTRO 10/2019 was released on November 2nd 2019. Its digital version will be available immediately.

Topic: Topic: Electroenergetics, Devices for transmission and distribution of electricity

Main Article
Problematics of measurement on inverter welding sources

SVĚTLO (Light) 5/2019 was released on September 16th 2019. Its digital version will be available immediately.

Professional organizations activities
International conference LIGHT (SVĚTLO) 2019 – 6th announcement
We participated in International commission on illumination CIE 2019 congress in Washington
Technical colloquium SLOVALUX 2019

Fairs and exhibitions
Inspire with boho styl and design of Far East at autumn fair FOR INTERIOR

All-perovskite tandem solar cells with 24.8% efficiency

09.10.2019 | 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

-jk-

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Published: 14.10.2019

The Nobel Prize in Chemistry 2019

Published: 11.10.2019

New lens ready for its close-up

Published: 08.10.2019