Solution-processed semiconductors have come to rival traditional laser materials at visible wavelengths. While most semiconductors are made with complicated and costly deposition methods, perovskites combine the cheap manufacturing process of solution-cast plastics with good optical and electrical properties of inorganic crystals. These features have made perovskites a hot topic in solar cell research and a promising gain material for color-tunable LEDs and lasers. Until now, perovskites have lased only when optically pumped with ultrashort pulses. In this paper, Alias and colleagues present the first continuous-wave green perovskite laser. Lasing was obtained even at room temperature due to the high crystal quality of the perovskite thin film placed in a low-loss microcavity with optimal length. The performance of perovskite lasers is still far from that of other semiconductor lasers emitting at green. To compete with GaN and quantum dot-based vertical emitters, electrical pumping must be realized. However, given the incredibly fast progress that perovskite lasers have shown in the past three years since their first demonstration, it looks like there is no obstacle too great to be surmounted using perovskites.
You must log in
to add comments.