New way to produce 3D/2D bilayer perovskite solar cells with 24.5% efficiency
US researchers have discovered an appropriate solvent design for the application of a 2D top layer on a perovskite solar cell. The cells incorporate the stability of 2D perovskite cells and the efficiency of 3D cells without destroying the 3D bottom layer, which brings them closer to commercialization.
Ultra-thin 2D perovskite solar cell with 18.3% efficiency
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.
Inverted perovskite solar cell with 21.1% efficiency and high moisture resistance
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%.
Another route to high performance perovskites
Scientists at Pennsylvania State University have developed a new class of perovskite materials, which they say exhibits unique properties that could have several implications for the development of perovskite solar cells, as well as other electronic applications.
