Excitonic Properties of Inorganic-Organic Hybrid Perovskites and Nanophotonic Devices
School of Physical and Mathematic Sciences & School of Electrical and Electronic Engineering
Nanyang Technological University, Singapore, 637371
Abstract: In this talk, we present investigations of vapor phase synthesis of purely inorganic or organic-inorganic perovskites nanoplatelets by a van der Waals epitaxy mechanism and their excitonic properties. Those crystals exhibit 2D well-faceted triangular, hexagonal or square geometry with thickness range of tens to hundreds of nanometers. Optical spectroscopy investigations suggest that the crystals have large exciton binding energy, high external quantum efficiency and long diffusion lengths. The naturally formed high-quality planar whispering-gallery mode cavities ensure adequate gain and efficient optical feedback for low-threshold optically pumped in-plane nanolasers ranging from ultraviolet and near-infrared, with an exceptionally high quality factor (>4000) in purely inorganic perovskite square-shaped crystals. Our findings open up a new class of wavelength tunable nanomaterials potentially suitable for on-chip integration and flexible optoelectronic devices. Progress in light-emitting diode and laser cooling will also be discussed.
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To cite this abstract:Qihua Xiong; Excitonic Properties of Inorganic-Organic Hybrid Perovskites and Nanophotonic Devices. The 16th European Microscopy Congress, Lyon, France. https://emc-proceedings.com/abstract/excitonic-properties-of-inorganic-organic-hybrid-perovskites-and-nanophotonic-devices/. Accessed: January 25, 2021
EMC Abstracts - https://emc-proceedings.com/abstract/excitonic-properties-of-inorganic-organic-hybrid-perovskites-and-nanophotonic-devices/