11. The perovskite structure can be deduced based on powder x-ray diffraction measurements. 12. Such a design is common for current perovskite or dye-sensitized solar cells. 13. The cuprate superconductors adopt a perovskite structure. 14. Natural compounds with this structure are perovskite , loparite, and the silicate perovskite bridgmanite. 15. Natural compounds with this structure are perovskite, loparite, and the silicate perovskite bridgmanite. 16. Only zirconolite and perovskite can accommodate actinides. 17. In 2015, researchers developed a prototype cell that used semitransparent perovskite with graphene electrodes. 18. Different from silicon with an indirect bandgap, perovskite material has a direct band gap. 19. For perovskite solar cells, the existence of a photon recycling effect is still unclear. 20. Perovskite solar cells have active materials with a crystalline structure identical to the mineral perovskite.
