An interdisciplinary team of researchers has laid the foundations for an entirely new type of photovoltaic cell. In this new method, infrared radiation is converted into electrical energy using a different mechanism from that found in conventional solar cells. The mechanism behind the new solid-state solar cell made of the mineral perovskite relies on so-called polaron excitations, which combine the excitation of electrons and vibrations of the crystal lattice.
[phys.org] – Scientists lay foundations for new type of solar cell
[onlinelibrary.wiley.com] – Evolution of Hot Polaron States with a Nanosecond Lifetime in a Manganite Perovskite
[cleantechnica.com] – Holy Hot Polarons, Batman! New Perovskite Solar Cell Shows Promise
Forget everything you know about solar cells and check this out. A research team based at the University of Göttingen in Germany has come up with something they call an “entirely new” way to harvest energy from sunlight. In effect, the new solar cell puts the brakes on excited electrons, extending their lifetime. The result is a more efficient solar cell, with less energy lost in the form of heat and more energy converted to electricity.
[wikipedia.org] – Polarons
A polaron is a quasiparticle used in condensed matter physics to understand the interactions between electrons and atoms in a solid material. The polaron concept was first proposed by Lev Landau in 1933 to describe an electron moving in a dielectric crystal where the atoms move from their equilibrium positions to effectively screen the charge of an electron, known as a phonon cloud. This lowers the electron mobility and increases the electron’s effective mass.