17/12/2021
Researchers Develop Stable Materials to Help Create Solar Cells with Better Efficiency
Crystalline silicon is the most extensively used material for solar cells. However, in the last 10 years, perovskite solar cells, composed of metal halide perovskite materials, have demonstrated the potential to make cheaper and possibly more efficient solar cells than silicon.
But while perovskite solar cells can currently compete with regard to efficiency with more well-known silicon-based solar cells, a crucial challenge that remains unanswered is their chemical instability. Perovskite materials are highly sensitive to oxygen, moisture and even light, meaning they can deteriorate quickly in air.
A certain perovskite material known as formamidinium perovskite could help tackle this problem as its pure, black-colored crystal structure, called FAPbI3, is more chemically stable than a number of other perovskites. Its optical features are also much better matched to absorb light and generate electricity efficiently in a solar cell than present-day perovskite materials.