New Ultrawide-Band-Gap Perovskite Materials

Perovskite materials offer a promising pathway for advancing future optoelectronic devices including light-emitting diodes (LEDs), lasers, and solar cells. While considerable research has focused on the visible light range, yielding excellent device properties, the discovery of perovskite materials suitable for UV LED applications remains challenging. To address this issue, theoretical calculations have been employed to identify potential perovskite compositions with ultrawide band gap properties. In this study, we were fortunate to discover new inorganic/organic halide perovskite materials, such as EAPbCl3, CsMgBr3, CsMgCl3, and FASrCl3, which exhibit ultrawide band gaps of 3.53, 5.47, 5.55, and 5.82 eV, respectively. This breakthrough highlights the potential of these novel materials for future UV LED applications.