Okay, here’s an explanation that even a five-year-old can understand. Imagine you have a big cookie, but you want to share it with your friends evenly. The ruddlesden-popper phase is like cutting the cookie into tiny little pieces so that everyone gets the same amount.
But instead of a cookie, we’re talking about materials made of different atoms that are arranged in a certain way. Imagine those atoms as if they were Lego bricks, and we’re building something cool with them, like a spaceship. The ruddlesden-popper phase is a specific way of arranging those Legos so that they’re not all jumbled up, but instead form a specific pattern that makes the spaceship stronger and more stable.
Scientists use really big machines to study these materials in detail and figure out how they can be put together in the best way possible. Just like how you might ask your friends how they liked your cookie and if you could have cut it differently next time, scientists ask their fellow scientists if they like the way they’ve arranged their Legos, or if they could make it even better!