High-yield CsPbBr3 quantum dots via microfluidic technology for photodetectors

Cesium lead halide perovskite quantum dots (CLHP QDs) are well-known for their high stability and excellent charge-carrier mobility. However, the commercialization of perovskite quantum dots (QDs) is limited by the challenges associated with scaling up production using many synthesis methods. In this work, microfluidic technology was utilized to synthesize CsPbBr3 QDs in air, achieving a yield greater than 45 %. Additionally, the synthesized CsPbBr3 QDs were applied to photodetectors (PDs). The results indicate that increased QD size reduces carrier recombination and enhances electronic coupling between the inter-nanocrystals (NCs), increasing carrier transport capacity and diffusion efficiency. The specific detectivity (D*) of the PDs can reach 1012, demonstrating excellent weak-light detection ability.