So far, efforts have been focused on improving perovskite solar cell efficiency by optimizing their architecture and the fabrication processes.
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.
Recently perovskite materials have gained much attention as a solution to the longstanding problem of solar cell efficiency.
Perovskite solar cells are made of a mix of organic molecules and inorganic elements that together capture light and convert it into electricity, just like today’s more common silicon-based solar cells.
The new device consists of two perovskite solar cells stacked in tandem.
NREL scientists turned to quantum dots to remove the unstable organic component and open the door to high- efficiency quantum dot optoelectronics that can be used in LED lights and solar photovoltaics.