Publication date: 15th December 2025
Achieving precise control over the crystalline phases and dimensionality of metal halide semiconductors is essential for optimizing the performance and long-term stability of perovskite-based optoelectronic devices. In this talk, I will present our recent advances in the rational design of 3D, 2D, and mixed 3D/2D metal halide structures, with particular attention to how different phases evolve over time in the presence of a variety of environmental and operational stressors. I will highlight how substrate characteristics and additives can modulate chemistry, structural phase purity, optoelectronic properties of halide perovskite, and how these changes impact device behavior. These insights will be discussed in the context of both solution- and vapor- deposition routes, providing a comparative perspective on phase selective synthesis strategies. Device applications including photovoltaics and exciton polaritons will be discussed in this talk. Overall, our findings offer generalizable guidelines for designing stable, phase-pure perovskite and perovskite-inspired materials for next-generation optoelectronic applications.
The author would like to acknowledge support from the Goizueta Foundation.
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