Biluminescent

This illustration is inspired by a scientific article that talks about a type of material called nitrogen-containing indolocarbazoles (NICz) that can emit light in two different ways at the same time. This ability to emit light in two ways at once is called biluminescence.

Most materials emit light in a process called fluorescence, where they absorb energy and then release it as light. Another way is called phosphorescence, which is like fluorescence but slower and involves different energy states.

The special thing about NICz compounds is that they can do both at the same time. They emit light in two different colours: one in the near-UV region (which is close to violet or blue) and another in the green region. This is useful for a number of applications, such as making sensors, preventing counterfeiting or making better electronic devices.

The researchers also found something really interesting: two of these NICz compounds can emit light in a special way called multi-resonant thermally activated delayed fluorescence (MR-TADF), along with phosphorescence. This is the first time anyone has seen this combination in organic materials.

They tested how these emissions change with factors such as temperature and concentration. By understanding these changes, they can control how the material emits light, which is important for making better devices.

To understand why these materials behave the way they do, the scientists also carried out some theoretical calculations. These calculations help explain how the molecules are structured and how they behave when they absorb and release energy.

Put simply, this research helps us understand a new type of material that can emit light in two different ways at the same time. This could lead to new and improved technologies in a variety of fields.