For additional context about the lead: https://www.cei.washington.edu/education/science-of-solar/perovskite-solar-cell/ https://www.cei.washington.edu/educatio

For additional context about the lead: https://www.cei.washington.edu/education/science-of-solar/perovskite-solar-cell/ https://www.cei.washington.edu/education/science-of-solar/pe... "while the best-performing perovskites are today made with a small amount of lead, researchers are also exploring alternative compositions and new encapsulation strategies, in order to mitigate concerns associated with lead toxicity."