William Tisdale1

1, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States

Atomically thin 2D halide perovskites are a promising new class of semiconductor nanomaterials, exhibiting bright luminescence, tunable and spectrally narrow absorption and emission features, strongly confined excitonic states, and facile synthesis. In this talk, I will demonstrate recent progress from our group in the synthesis and understanding of optical properties in colloidal perovskite nanoplatelets and 2D layered perovskites. Results to be highlighted include synthetic tuning of the exciton energy, fabrication of perovskite light-emitting devices, structural transformations in 2D, and the origin of dimensionality-dependent vibrational modes.