Proceedings of nanoGe Fall Meeting 2021 (NFM21)
DOI: https://doi.org/10.29363/nanoge.nfm.2021.120
Publication date: 23rd September 2021
Emission of single photons from an isolated colloidal semiconductor nanocrystal is a well-studied phenomenon. In fact, nowadays we can design nanocrystals with engineered shape and/or composition to optimize single-photon emission and prevent detrimental processes such as blinking or slow photon emission.
All the knowledge gathered on single-photon emission processes in colloidal semiconductor nanocrystals is based on the use of light as excitation source, and rightly so, as this allows to carefully study the photophysical processes governing photons generation via exciton recombination. Yet, for colloidal semiconductor nanocrystals to be appealing from an application point of view, single-photon emission from nanocrystals must be triggered via electrical injection of an electron and hole pair. Currently, electrical generation of single photons in nanocrystals has only been marginally explored; to reach such objective, electrode design, nanocrystals deposition control and other device fabrication aspects must be addressed.
In this seminar, I will present some initial results on how to position a single nanocrystal on an electrode or other venues to fabricate light-emitting diodes based on a single and isolated colloidal semiconductor nanocrystal. The methods employed exploit the properties of the two of the most studied types of nanocrystals: CdSe/CdS core-shell systems and perovskites ones.
European research council project NANOLED (ERC-StG-851794)
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