We Continue the Work of Those
Who Were the First.

  • Electrical Engineering
  • Light & Lighting
  • Power Engineering
  • Transportation
  • Automation
  • Communication
  • Smart Buildings
  • Industry
  • Innovation

Current issue

ELEKTRO 10/2017 was released on October 10th 2017. Its digital version will be available on October 10th 2017.

Topic: Electrical power engineering; RES; Fuel cells; Batteries and accumulators

Main Article
Electricity storage
Electrochemical impedance spectroscopy of batteries

SVĚTLO (Light) 5/2017 was released on September 18th 2017. Its digital version will be available on September 18th 2017.

Luminaires and luminous apparatuses
MAYBE STYLE introducing LED design luminaires of German producer Lightnet
TREVOS – new luminaires for industry and offices
How many types of LED panels produces MODUS?
Intelligent LED luminaire RENO PROFI

Interiors lighting
The light in indoor flat interior – questions and answers

Mystery that was holding back development of next-generation solar cells solved

30.12.2016 | Imperial College London | www.imperial.ac.uk

Scientists have identified an unexpected cause of poor performance in a new class of flexible and cheap solar cells, bringing them closer to market.

In the new study, scientists looked at solar cells made from materials known as perovskites. These can be produced cheaply from chemicals mixed into printable or sprayable ink, which then crystallises to form light-absorbing films.

Solving the mystery of perovskite solar cells

However, perovskite films contain charged defects that are likely to impair their performance. Slow movement of these defects is thought to be responsible for a process known as hysteresis, which leads to irregularities in the efficiency with which light is converted to electrical current.

Now researchers from Imperial College London and collaborators have developed new experiments to follow which direction electrons move in the solar cell when they are generated with a short pulse of light. They found that the mobile charged defects are still present even in solar cells with very efficient contact materials, despite these cells showing no hysteresis. Hysteresis was only found when cells suffered the combined effects of both the defects and poor selectivity at the contacts.

Read more at Imperial College London

Image Credit: Imperial College London

-jk-