Perovskite solar cell is well known for their flexible, thinner, lightweight, and high power conversion efficiency (PCE) properties. According to PV Magazine, the highest efficiency that has been reached is 25.6% but one thing should remember that this efficiency is achieved under a controlled lab environment.
To understand how does perovskite solar cell work? First, look at this Fig 1, this is a Regular planar-structured perovskite solar cell here ETL stands for electron transport layer and HTL is for Hole Transport Layer.
Fig 2, represents the general working principle of the perovskite solar cell. the process of generation of electricity in the perovskite solar cell includes charge generation (absorption of light and formation of electrons and holes), charge transport, charge carrier losses through recombination, and charge extraction.
First perovskite layer absorbs sunlight then the electron-hole (called excitons together) pair generates after that electron and the hole gets separated and the electron is transported to ETL, followingly go to the transparent oxide layer. On the other hand, holes transport to HTL, followingly reaches to the metal electrode.
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