Graphene 'Armor' Extends Perovskite Solar Cell Lifespan, Enabling Commercial Use

A team at East China University of Science and Technology announced a method to significantly extend the lifespan of perovskite solar cells. Published in *Science* on March 6th, the research details an ultrathin protective layer using graphene and a transparent polymer. This "armor" doubles the material's stress resistance, reducing expansion under light from 0.31 percent to 0.08 percent. Perovskite cells, known for high efficiency and low cost, degrade quickly under sunlight, hindering practical use. The new protective layer allows cells to maintain 97 percent efficiency after 3,670 hours of continuous operation under simulated conditions, marking a record for stability. Pilot trials with industry partners are underway, with potential applications including power-generating building facades and foldable charging mats. Perovskite cells could cost just a third of silicon cells, with further efficiency improvements possible.