Heterogeneity and Stability in Halide Perovskites

A central research focus of our group is the role of material heterogeneity in governing long-term device stability. Halide perovskites inherently exhibit compositional fluctuations, strain variations, defect clustering, and ionic redistribution across multiple length scales. These inhomogeneities evolve under operational stress, directly influencing device degradation.

We investigate how microscopic disorder translates into macroscopic instability. Through operando characterization and systematic aging studies, we identify the physical origins of performance loss and define materials and interface design principles for enhanced stability. By bridging nanoscale heterogeneity with device-scale behavior, our group aims to move beyond empirical stabilization approaches toward predictive and physically grounded strategies for durable optoelectronic systems.