Single-Step Microfluidic Synthesis of Halide Perovskite Nanolasers in Suspension

Chemically synthesized inorganic lead halide perovskite lasers based on nanostructures, generating coherent light at room temperature, and having a low threshold, have become powerful tools for various photonic applications. However, to fabricate high-quality nanostructures on a substrate, it is crucial to provide certain surface parameters and precisely keep synthesis conditions. Here, we report a novel approach for the one-step fabrication of high-quality CsPbBr₃ nanolasers in the form of suspension obtained by rapid precipitation in a microfluidic chip. The synthesis technique allows us to control the nanostructure morphology (size and shape) depending on the chip configuration and reagents’ flow rates in microchannels. One of the main advantages of the proposed approach is the ability to deposit the obtained perovskite nanolasers on an arbitrary surface. This paves the way for creating various nanophotonic designs with high throughput and excellent control of geometrical parameters.