Excitons could revolutionize the way engineers approach electronics. A team of EPFL researchers has created a new type of transistor—one of the components of circuits—using excitons instead of electrons. Notably, their exciton-based transistor functions effectively at room temperature, a hitherto insurmountable obstacle. They achieved this by using two 2-D materials as semiconductors. Their study, which was published today in Nature, has numerous implications in the field of excitonics, a promising new area of study alongside photonics and spintronics.