Stabilizing FAPI: Additivization Strategy

• This research breakthrough makes it possible to develop water-stable perovskites for perovskite solar cells. An innovative additivization strategy was used to achieve this, with the lowest formation energy for a 3C phase with exceptional stability against water infiltration, humidity and thermal stresses. A game-changer for solar cells!

Researchers have found a way to develop water stable perovskites, an important material for perovskite solar cells. This was achieved through a unique additivization strategy to stabilize the FAPI alpha phase. A bifunctional organic ammonium salt, S-(2-Aminoethyl)isothiouronium iodide hydroiodide, was used as an additive and its influence on structural, photophysical properties and phase stability of FAPI was explored. Through the optimized additivization, they identified the lowest formation energy for an intermediate phase close to the 3C phase instead of the well-established photo-inactive 2H phase. Structure-photophysical property correlation studies demonstrated exceptional stability against water infiltration, humidity, shelf life, and thermal stresses. The team's findings substantiated the role of Pb…S interaction in stabilizing the cubic phase and the stoichiometric distribution of elemental components. This discovery could be a game-changer for perovskite solar cells, greatly improving their efficiency and use.

What Impact Does Additivization Have on Perovskite Solar Cells?

• The additivization strategy was found to effectively stabilize the FAPI alpha phase, an important material for perovskite solar cells.
• The use of a bifunctional organic ammonium salt, S-(2-Aminoethyl)isothiouronium iodide hydroiodide, helped to determine the lowest formation energy for an intermediate phase close to the 3C phase.
• Through the optimized additivization, this phase proved to be exceptionally stable in the presence of water infiltration, humidity, and thermal stresses.
• The findings of the study suggest a strong correlation between the stoichiometric distribution of elemental components and the structural importance of Pb…S interactions.
• The additivization strategy could potentially revolutionize the efficiency and use of perovskite solar cells.