Scientists at Kanazawa University in Japan are experimenting with improving the performance of perovskite solar cells by using two special types of titanium oxide, anatase and brookite.

The researchers claim that by applying a bismuth layer of water-soluble brookite nanoparticles to the anatase layer, a perovskite cell has achieved a conversion efficiency of 16.82%. They say that this method can increase the transmission of electrons from the center of the cell to the electrode, while also preventing the charge from recombining at the boundary between the perovskite material and the electron transport layer. Both of these effects enable the perovskite cell to achieve higher conversion efficiencies. The team emphasized that the anatase layer is formed by spraying a solution on glass coated with a transparent electrode heated to 450 ° C, while the brookite layer is made of water-soluble brookite nanoparticles because This ink is more environmentally friendly than conventional inks. In January of this year, another group of Japanese researchers announced the use of tin dioxide (SnO2) instead of the more commonly used titanium dioxide to produce perovskite solar cells. In early March, scientists at the Argonne National Laboratory, part of the US Department of Energy (DOE), published their findings on alternatives to titanium dioxide in solar cells. Scientists around the world are currently studying how to use the various materials including titanium, tin and antimony to replace the lead materials required for the production of ordinary perovskite batteries.

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