(461d) Ion Formation and Migration Control through Additive Engineering in Perovskites

Metal halide perovskites (MHPs) have emerged as promising materials for various optoelectronic applications due to their excellent optical and electronic properties. However, halide vacancies in MHPs can cause ion migration and degradation, limiting their stability and performance. In this talk, we propose a new approach to control of ion formation and migration in MHPs through additive engineering. By carefully controlling the molecular structure of additives, such as the number of anchoring sites, molecular weight, and steric hindrance, we can effectively suppress the formation of halide vacancies and reduce ion concentration. Our studies show that the introduction of oligomeric additives containing multiple binding groups can enhance the stability, morphology, and photoluminescence properties of MHP films. This approach will provide a new pathway for the development of high-quality MHPs for various optoelectronic applications.