Materials that absorb and emit beyond the bandgap of silicon have many potential uses, from biomedical imaging to novel optoelectronic architectures.  We report bright (&gt;30% QY) tunable shortwave infrared (SWIR) emission from Hg/Cd chalchogenide nanoplatelets. Through modification of ligand coverage we tune this emission from 1 -2 microns, while retaining quantum confined HgTe absorption features. This creates a large intrinsic stoke shift between absorption and emission, associated with exciton self trapping. Broadly speaking, these nanocrystals reveal the non-trival role of ligand coverage and surface dominated properties of 2D nanocrystals.  We will show that these unique NCs may be useful as a luminescent concentrator of visible light into telecom wavelengths.

Shortwave infrared highly emissive nanostructures derived from Cd/Hg chalchogenide platelets

2019 Fall National Meeting

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