Achieving Low Threshold and Stable Amplified Spontaneous Emission in MAPbBr Perovskite with Sulfobetaine-Based Ligand Treatment.

Lead halide perovskites are promising emitters for short-range data communication lasers and amplifiers, but their application is limited by the defect density and poor stability arising from solution-based fabrication and rapid crystallization. Additive engineering offers an effective strategy to regulate crystal growth, optimize film morphology, and passivate defects both in the bulk and at the surface. Herein, a zwitterionic molecule sulfobetaine 10 (SFB10) is introduced into a two-step spin-coating process to fabricate high-quality MAPbBr films.

Light-assisted precise control of micro-cavity lasers for lead halide perovskite nanorods.

The development of integrated on-chip lasers featuring both low thresholds and high-quality factors remains a fundamental challenge in photonic integrated circuits, particularly for applications requiring visible coherent light sources. To develop micro-/nanolasers with high robustness and reliability, the fabrication of resonant cavities with controllable morphology and size is essential. In this work, we employed a light-assisted self-assembly approach to direct the formation of CsPbBr quantum dots into uniform, high-quality nanorods (NRs).