Dynamic Structures of Halide Perovskites—From Synthesis to Recycling

Halide perovskites have emerged as highly promising materials for various optoelectronic applications, such as solar cells, light-emitting diodes (LEDs), and photodetectors, due to their exceptional optical and electronic properties. However, their inherent instability, attributed to the soft nature of their crystal lattice and the tendency for ion migration, has posed a significant long-term challenge that limits their practical applications.
In this presentation, I will explore our recent advances in addressing these stability issues by synthesizing halide perovskite single crystals under varying pH conditions. By incorporating zwitterionic functional molecules into the synthesis process, we successfully tuned the coordination environment of lead halides. This approach not only enhanced the interaction between the organic and inorganic components but also significantly improved the structural stability of the crystals, particularly under direct exposure to moisture, which is a key factor in degradation.
Furthermore, I will discuss the phase transition behavior of halide perovskites and how it influences both their optical properties and long-term stability. The ability to control phase transitions is crucial for optimizing the material’s performance in optoelectronic devices. Understanding this dynamic aspect allows us to engineer more robust perovskites that maintain their optical properties over extended periods.
Finally, I will address a novel approach to recycling halide perovskite precursors from solution, enabling the recovery and reuse of perovskite materials. This recycling process not only improves the environmental sustainability of perovskite-based devices by reducing material waste but also offers a cost-effective route for large-scale production. This aspect is becoming increasingly important as the commercialization of perovskite technology progresses.