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Researchers investigated the charge transport perovskite solar cells

Researchers investigated the charge transport perovskite solar cells

New insights into the working mechanism of perovskite-based solar cells could help these solar cells play a prominent role among the renewable energy carriers in future.
Conventional silicon solar cells could have an inexpensive competitor in the near future. Researchers from the Max Planck Institute for Polymer Research in Mainz, together with scientists from Switzerland and Spain, have examined the working principle of an innovative type of solar cell, where an organic-inorganic perovskite compound acts as the light absorber. The scientists observed that charge carriers accumulate in a certain layer in these photovoltaic elements. If this jam can be dissolved, the already considerable efficiency of these solar cells could be further improved. Perovskite-based solar cells could play a prominent role among the renewable energy carriers in future. Unlike the established silicon solar cells, which are costly and energy-intensive to manufacture, these cells are made cheap materials and are simple to produce.
Renewable energies are an essential element of the energy turnaround – however, their use must be worthwhile. Particularly in less sunny countries like Germany this is often not the case with solar cells. Perovskite solar cells, which have been investigated for some years now, could soon change this, if their efficiency can be further improved. This task is in the focus of a research team headed by Rüdiger Berger at the Max Planck Institute for Polymer Research in Mainz.
Perovskite solar cells generate electricity with the help of a layer consisting of an organic-inorganic compound which crystallizes in a perovskite structure. The ions in this structure form a cubic arrangement, i.e. a rectangular lattice. "Perovskite materials absorb light extremely well," says Rüdiger Berger, explaining how the solar cell works. "The light absorbed by the perovskite layer snatches an electron from an atomcreating a positively-charged electron vacancy, which we also refer to as a ‘hole'. Then all we have to do is channel the electrons to one electrode and the holes to another one – and electricity is produced."
Source:- sci-tec daily( prepared by science and technology information center)

 

 

03-10-2014 01:12 PM


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