Excitons are quasiparticles made from the excited state of electrons and - according to research being carried out EPFL - have the potential to boost the energy efficiency of our everyday devices. It's a whole new way of thinking about electronics. Excitons - or quasiparticles formed when electrons absorb light - stand to revolutionize the building blocks of circuits. Scientists at EPFL have been studying their extraordinary properties in order to design more energy-efficient electronic systems, and have now found a way to better control excitons moving in semiconductors. Their findings appear today . Quasiparticles are temporary phenomena resulting from the interaction between two particles within solid matter. Excitons are created when an electron absorbs a photon and moves into a higher energy state, leaving behind a hole in its previous energy state (called a "valence band" in band theory).
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