Aditya D. Mohite
The Rise of 2D Halide Perovskites
Two-dimensional halide perovskites (2D-HaP) are a sub-class of 3D perovskites, which have emerged as a new class of solution-processed organic-inorganic (hybrid) low-dimensional semiconductors. They imbibe their properties from four exciting classes of novel materials - quantum wells, atomically thin 2D materials, organic semiconductors, and 3D halide perovskites. There is growing consensus that their physical properties are dictated by the interaction between the organic cation and the inorganic framework, which presents a unique opportunity to tailor their behaviours. Moreover, the 2D-HaPs have demonstrated technologically relevant durability in contrast to the 3D-HaPs and combining them with 3D perovskites has demonstrated the path for overcoming the issue of long-term durability in halide perovskite-based optoelectronic devices.
In this talk I will describe our work over the past five years on 2D-HaPs ranging from the fundamental light-induced structural behaviors, solvation dynamics to control homogeneity of layer thickness, novel photo-physical behaviors, charge transport and their role in high-efficiency optoelectronic device, with technologically relevant durability. I will also present key challenges and opportunities, which highlights the complex and rich materials chemistry, physics and engineering, which are at the root of 2D-HaP semiconductors and if resolved would lead to low-cost, technologies that shape our future.