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Current issue

ELEKTRO 6/2017 was released on June 7th 2017. Its digital version will be available on June 26th 2017.

Topic: Rotating el. machines; Drives and power electronics; Frequency converters; Electromobility

Main Article
Use of programmable logic devices in electric drives
Permanent-magnet DC electric machines

SVĚTLO (Light) 3/2017 was released on June 9th 2017. Its digital version will be available on July 10th 2017.

Lightning sources
Terminology of LED lighting sources 

Daylight
The day lighting of big living rooms
Light technology assessment of linear structure

Chemically Storing Solar Power

22.02.2016 | TU Wien | www.tuwien.ac.at

By combining  highly specialised new materials, the scientists at TU Wien (Vienna) have managed to combine high temperature photovoltaics with an electrochemical cell. Ultraviolet light can be directly used to pump oxygen ions through a solid oxide electrolyte. The energy of the UV light is stored chemically.

The key to success was an unusual choice of materials. Instead of the ordinary silicon based  photovoltaics, special metal oxides - so-called perovskites - were used. By combining several different metal oxides, the scientists managed to assemble a cell which combines photovoltaics and electrochemistry.

New way of storing solar power

New cell consists of two different parts – a photoelectric part on top and an electrochemical part below. In the upper layer, ultraviolet light creates free charge carriers, just like in a standard solar cell. The electrons in this layer are immediately removed and travel to the bottom layer of the electrochemical cell. Once there, these electrons are used to ionize oxygen to negative oxygen ions, which can then travel through a membrane in the electrochemical part of the cell.

Read more at TU Wien

Image Credit: TU Wien

-jk-