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Proceedings Paper

Intraband transition in self-doped narrow band gap colloidal quantum dots
Author(s): Bertille Martinez; Clément Livache; Adrien Robin; Herve Cruguel; Sebastien Royer; Xiang Zhen Xu; Herve Aubin; Sandrine Ithurria; Emmanuel Lhuillier
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Paper Abstract

In this article we discuss the infrared properties of self-doped nanocrystals and in particular the case of HgSe. HgSe colloidal quantum dots have recently been reported for their tunable optical features all over the mid infrared from 3 to 20 μm. Their optical absorption is a combination of interband absorption at high energy and intraband absorption at low energy. The latter results from the self-doped character of HgSe. The origin of this self-doping is also discussed. We demonstrated that the doping results from the combination of the narrow band gap and high work function of HgSe, which leads to a reduction of the CQD by the water in the environment. In addition, we demonstrated that the doping density can be tuned over an order of magnitude thanks to the control of the capping ligands.

Paper Details

Date Published: 27 January 2017
PDF: 7 pages
Proc. SPIE 10111, Quantum Sensing and Nano Electronics and Photonics XIV, 101112S (27 January 2017); doi: 10.1117/12.2250155
Show Author Affiliations
Bertille Martinez, Sorbonne Univ., UPMC Univ. Paris 06, Institut des Nanosciences de Paris, UPMC-CNRS (France)
Clément Livache, Sorbonne Univ., UPMC Univ. Paris 06, Institut des Nanosciences de Paris, UPMC-CNRS (France)
Lab. de Physique et d'Étude des Matériaux, PSL Research Univ., CNRS (France)
Adrien Robin, Lab. de Physique et d'Étude des Matériaux, PSL Research Univ., CNRS (France)
Herve Cruguel, Sorbonne Univ., UPMC Univ. Paris 06, Institut des Nanosciences de Paris, UPMC-CNRS (France)
Sebastien Royer, Sorbonne Univ., UPMC Univ. Paris 06, Institut des Nanosciences de Paris, UPMC-CNRS (France)
Xiang Zhen Xu, Lab. de Physique et d'Étude des Matériaux, PSL Research Univ., CNRS (France)
Herve Aubin, Lab. de Physique et d'Étude des Matériaux, PSL Research Univ., CNRS (France)
Sandrine Ithurria, Lab. de Physique et d'Étude des Matériaux, PSL Research Univ., CNRS (France)
Emmanuel Lhuillier, Sorbonne Univ., UPMC Univ. Paris 06, Institut des Nanosciences de Paris, UPMC-CNRS (France)


Published in SPIE Proceedings Vol. 10111:
Quantum Sensing and Nano Electronics and Photonics XIV
Manijeh Razeghi, Editor(s)

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