The ways of harnessing solar energy have evolved considerably in recent years, and this is good news for the most diverse market segments. In addition to a greener planet, this type of energy can be used, for example, by electric vehicle manufacturers.
According to recent information, the efficiency record was broken with a new perovskite solar cell.
A team of researchers from Helmholtz-Zentrum Berlin (HZB) published in the magazine Science the development of a perovskite / silicon cell that achieved an efficiency of 29.15%. This is a new world record.
95% of the photovoltaic panels that we see installed are based on silicon solar cells, a material that is abundant in the earth's crust, and which allows a yield of sunlight of 27% to be taken, but which in reality are only 17% efficient.
Perovskite (calcium and titanium oxide, CaTiO3), is a relatively rare mineral occurring in the form of orthorhombic (pseudocubic) crystals. Its structure consists of atoms or molecules of the crystals that is ABX3.
It means that it has 3 different components, organized in a cubic way. In which one of the atoms, A, is at the vertices of the cube, B in the center and X in the center of each face of the cube. This is a known structure and used in several devices, but applied to solar cells it is relatively recent!
New Perovskite cell with a record 29.15% efficiency
With an efficiency of 29.15%, the previous achievement of 28% was surpassed. The long-term efficiency target for a perovskite / silicon solar cell is 30%, so this is an achievement very close to that goal.
In addition to this achievement, the good news is that scientists are optimistic that the “limit” of 30%, for this type of panel, can be exceeded, achieving even greater solar energy efficiency.
Silicon is currently the material used in solar cells, and perovskite and silicon were developed separately as semiconductor materials for solar panels. Scientists see perovskite as having untapped potential and have been experimenting with this material, combining it with other materials.