Making solar cells is like buttering bread

ScienceDaily | 3/21/2019 | Staff
bungienet (Posted by) Level 3
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Formamidinium lead iodide (FAPbI3) is a perovskite, a crystal with a distinctive structure. Perovskites are named after a mineral that has the chemical formula ABX3. In an idealized cubic unit cell, the X position is occupied by anions that form an octahedron with a central cation in the B position while the corners of the cube are occupied by the A position cations (see picture).

'This formamidinium lead iodide material has very good characteristics, but the A position formamidinium ion causes instability in the structure,' explains Loi. 3D films made from this material most often turn out to be a mixture of a photoactive and a photoinactive phase, the latter being detrimental to the final application. Loi therefore set her PhD student Sampson Adjokatse to work to find a solution.

Strategies - Production - Loi - Cells - Panels

After trying different strategies, he found one that worked. 'And most importantly, one that is scalable and could be used for industrial production,' says Loi. After all, solar cells must be produced in large panels and it is very important to find a good and cheap technique to do so. Adjokatse started with a different perovskite, in which the formamidinium was replaced by a...
(Excerpt) Read more at: ScienceDaily
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