“Our study introduces an innovative lead iodide (PbI2) secondary growth and π-π stack regulation strategy that enhances the photovoltaic efficiency and stability of perovskite solar cells ...

Supplements (e.g. potassium iodide, sodium iodide, kelp) and iodine-containing herbs, such as bladderwrack, are other sources that can be considered. The impact of too little iodine reaches further.