Significantly advanced durability
“By chemically reinforcing the protective layers, we’ve significantly advanced the durability of these cells without compromising their exceptional efficiency, bringing us closer to a practical, low-cost alternative to silicon-based photovoltaics,” said Kanatzidis.
Researchers also underlined that the state-of-the-art perovskite solar cells typically have ammonium ligands as a passivation layer. However, ammonium tends to break down under thermal stress.
They did some chemistry to convert the unstable ammonium into a more stable amidinium.