Team
- Permanent members: Emmanuel Lhuillier, Yoann Prado
- PhD student: Huichen Zang
The group is involved in the design of optoelectronics devices using nanocrystals as active materials. To do so, we grow a broad range of material, see figure below:
Caption: microscopy image of some nanocrystal grown at INSP.
The team is fully furnished to perform nanocrystal growth and their characterization
Caption: image of nanocrystal synthetic setup.
The group has a special focus on narrow band gap material and for this topic we also developed new synthetic procedure. For example, we report the first highly concentrated synthesis of HgTe nanocrystals by swicthing from conventional mercury salts to liquid mercury as precursor. We thus obtained the most concentrated synthesis of HgTe nanpocrystal ever reported with concentration close to 100 g/L. This new synthetic route is promissing to achieve greener synthesis of HgTe with reduced exposure of work force to Hg precursor.
We have also been the first to report nanocrystals with THz absorption. A new synthetic procedure has enable the growth of nanocrystal with size above the Bohr radius, thus enabling absorption up to 100 µm. This work demonstrated the possibility to tune the absorption of HgTe nanocrystal all over the infrared from 1 to 100 µm.
Caption: Infrared spectra of HgTe nanocrystals with various sizes.
Collaborations
- ESPCI-LPEM – Sandrine Ithurria
- C2N – Gilles Patriarche (microscopy)
Funding
- ERC Black QD,
- Projet ANR Copin et Frontal
Transversal topic
Publications
- Nicolas Goubet, Maxime Thomas, Charlie Gréboval, Audrey Chu, Junling Qu, et al.. Near to Long-Wave Infrared Mercury Chalcogenide Nanocrystals from Liquid Mercury. Journal of Physical Chemistry C, American Chemical Society, 2020, ⟨10.1021/acs.jpcc.0c01255⟩. ⟨hal-02514168⟩
- Junling Qu, Nicolas Goubet, Clément Livache, Bertille Martinez, Dylan Amelot, et al.. Intraband Mid-Infrared Transitions in Ag 2 Se Nanocrystals: Potential and Limitations for Hgfree Low Cost Photodetection. Journal of Physical Chemistry C, American Chemical Society, 2018, ⟨10.1021/acs.jpcc.8b05699⟩. ⟨hal-01849301⟩
- Terahertz HgTe nanocrystals: beyond confinement, N. Goubet et al, J. Am. Chem. Soc. 140, 5053 (2018). https://pubs.acs.org/doi/abs/10.1021/jacs.8b02039
- Wavefunction engineering in HgSe/HgTe colloidal heterostructures to enhance mid infrared photoconductive properties, N. Goubet et al, Nano Lett 18, 4590 (2018). https://pubs.acs.org/doi/10.1021/acs.nanolett.8b01861
