2D hybrid perovskites

The solar cell was built with a layer of organic cations between the iodide on top, and lead on the bottom enhanced interactions between the layers. Its creators designed the device after they discovered that, when the sunlight hits a 2D perovskite, it contracts the space between atomic layers in the material.

Australian scientists have built a perovskite solar cell based on 2D and 3D salts. By adding a fluorinated lead salt in the processing solution – normally used to form 3D methylammonium lead iodide – they were able to achieve a 21.1% efficiency, an open-circuit voltage of 1.12 V, a short-circuit current of 22.4 mA/cm2, and a fill factor of 84%.

Saudi researchers claim to have improved the thermal stability and moisture resistance of such devices by replacing 3D hybrid perovskite with two-dimensional compounds. They used organic compound ethanolamine, which is said to provide better results in slowing down the hot-carrier cooling process.