(139e) Shaping the Future: The Rise of Two-Dimensional Halide Perovskites for Solar Energy Generation

Two-dimensional (2D) halide perovskites 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 perovskites have demonstrated technologically relevant durability in contrast to the 3D perovskites and their synergistic integration 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 perovskites ranging from novel fundamental light-induced structural behaviors and its impact on charge transport, solvation dynamics to control homogeneity of layer thickness and the synergy between 2D and 3D perovskites in achieving durable and high-efficiency photovoltaic devices.