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Communication Dans Un Congrès Année : 2017

Intraband transition in self-doped narrow band gap colloidal quantum dots

Résumé

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.
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Dates et versions

hal-01476526 , version 1 (25-08-2020)

Identifiants

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Bertille Martinez, Clément Livache, Adrien Robin, Hervé Cruguel, Sébastien Royer, et al.. Intraband transition in self-doped narrow band gap colloidal quantum dots. SPIE phpotonic west, Jan 2017, San Fransisco, United States. ⟨10.1117/12.2250155⟩. ⟨hal-01476526⟩
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