Scientists have long known that perovskite materials are promising candidates for use in solar cells. Perovskites are a class of materials that have a specific crystal structure, and they are known for their ability to absorb light and convert it into electricity. However, the exact mechanism by which perovskites work has not been fully understood.

Now, a team of researchers from the University of California, Berkeley, has used a new technique to study the atomic structure of perovskite materials in real time. The technique, called time-resolved X-ray scattering, allowed the researchers to see how the atoms in perovskite materials move when they are exposed to light.

The researchers found that when perovskite materials are exposed to light, the atoms in the material begin to vibrate. These vibrations create an electric field, which can then be used to generate electricity. The researchers also found that the vibrations of the atoms are very fast, occurring on a timescale of femtoseconds (10-15 seconds).

This new understanding of how perovskite materials work could help scientists to design more efficient solar cells. Perovskite solar cells are already very efficient, but by understanding the exact mechanism by which they work, scientists may be able to make them even more efficient.

The study was published in the journal Nature Materials.

Here is a summary of the key points from the study:

* Perovskite materials are a promising class of materials for use in solar cells.

* The researchers used a new technique to study the atomic structure of perovskite materials in real time.

* They found that when perovskite materials are exposed to light, the atoms in the material begin to vibrate.

* These vibrations create an electric field, which can then be used to generate electricity.

* The vibrations of the atoms are very fast, occurring on a timescale of femtoseconds (10-15 seconds).

* This new understanding of how perovskite materials work could help scientists to design more efficient solar cells.