Proceedings of September Meeting 2016 (NFM16)
Publication date: 14th June 2016
2D colloidal nanoparticles, called nanoplatelets, have attracted attention in the last couple years. Cadmium chalcogenides nanoplatelets exhibit improved optical features such as narrow photoluminescence linewidth thanks to the atomic control of their confinement direction (i.e. no inhomogeneous broadening). Moreover it is possible to tune their emission properties either by growing core/shell heterostructures (thickness growth), or core/crown heterostructures (lateral growth). In type II CdSe/CdTe we observe a broad emission in the near infrared (NIR) with a large Stoke shift compare to the absorption. It is now possible to obtain NPLs which absorbs and emits in the NIR. In order to reach this region, we use cation exchange on cadmium chalcogenides NPLs to obtain HgTe and HgSe nanoplatelets. HgTe NPLs present emission features in the near infrared range with a full width at half maximum at least two times narrower than the alternative emitters (PbS, CuInS2) in the same range of wavelength. I will briefly discuss the integration of the NPLs into optoelectronic devices.
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