Scientists at the Stanford Synchrotron Radiation Lightsource (SSRL) and Stanford University have found a way to make perovskites with qualities ideal for the material's use in solar cells. "Our study builds on work by other groups of researchers at Oxford, Cornell and Stanford that showed using chlorine in the processing can lead to high-quality perovskite films with impressive performance," Aryeh Gold-Parker, PhD student in Stanford University's chemistry department, said.
The perovskite production process begins by dissolving the basic ingredients in a solvent. The solution is deposited and dried, creating a film. The initial crystallized film is known as the precursor. Finally, the film is heated and cooled, reorganizing the film's structure and yielding a perovskite. Though the basic recipe and ingredients are simple, slight chemical manipulations at each stage of the production process can alter the material's physical properties.