Abstract

Mixed-halide perovskite materials are promising candidates for photonic applications due to their tunable bandgap and enhanced optoelectronic properties. Unfortunately, phase segregation in these materials severely impacts their scalability. Additive engineering strategy in most perovskite crystal growth has proved more effective. Current work focuses on MAPbBr3-xClx (MH) single crystals towards laser stability using nitrogen-based additives. These additives assist in forming high surface quality crystals along with mitigate phase segregation by increasing the crystallinity at the nano-level. The dependence of morphology and optical properties concerning additives is demonstrated besides unveiling its importance on the crystallinity, surface passivation, and stability in MH single crystals towards the laser. The additive engineering strategy showed a clear impact on terahertz (THz) transmission and reflection properties and generation of higher-order harmonics from their laser induced plasma plumes.