Tze Chien Sum1

1, Nanyang Technological University, Singapore, , Singapore

Solution-processed halide perovskites possess exceptional photovoltaic properties. Amazingly, these materials are also outstanding optical gain media. Halide perovskites are the latest member of solution-processed optical gain media, joining organics and traditional semiconductor colloidal quantum dots. Amplified spontaneous emission and lasing have been demonstrated in various halide perovskite configurations and nanostructures with wavelengths tunable over the visible and infrared wavelengths (400 – 1000 nm). Despite the success of optically-pumped perovskite lasing, electrically-pumped lasing is still elusive. Challenges include the high current densities needed for electrical driven lasing and their heating effects and perovskite degradation (given the low thermal conductivity of halide perovskites). In this talk, I review the milestones, state-of-the-art and prospective outlook of this new family of lasers.