The Curious Case of Perovskite Solar Cells.
Part 2.1: Under The Hood.
One-line summary of part 1: Perovskites are a class of materials which are very popular in research in the solar energy domain.
For the rest, please read the article from here:
Picking up from ABX₃..
Let’s start here by defining the reason behind calling them the “metal halide” perovskites. Take a look at the following figure, which shows the most commonly used candidates for the A, B and X in a perovskite solar cell:
As you may already have noticed, the B-cation is a metal (Lead is the most common, but tin is catching up, and so is, uncommonly, Rubidium) and the X-anion belongs to the 17th group of the periodic table of elements, famously called as “halogens”. The salts/chemical compounds made with these halogens are called halides.