KETEP 세계에너지시장정보

The work addresses a persistent challenge in perovskite photovoltaics: residual lead iodide, PbI₂, that remains at the surface of the perovskite after film formation. Although moderate amounts of PbI₂ can be beneficial during crystallization, an inhomogeneous distribution at the final interface can create local variations in surface potential, promote charge trapping and increase nonradiative recombination.