2D/0D Heterostructure for IR Light Absorption/Detection

• Auteur / Autrice : Do Lam Nguyen
• Direction : Emmanuel Lhuillier
• Type : Projet de thèse
• Discipline(s) : Physique et chimie des matériaux
• Date : Inscription en doctorat le 15/05/2023
• Etablissement(s) : Sorbonne université
• Ecole(s) doctorale(s) : École doctorale Physique et chimie des matériaux
• Partenaire(s) de recherche : Laboratoire : Institut des nanosciences de Paris

Mots clés

Mots clés libres

2d material

Nanocrystal

Photodetector

Phototransistor

Near infrared

Light matter coupling

Résumé

The project targets to design a mixed dimensionalities van der Waals heterostructure made of a 2D material used as high mobility material and 0D nanocrystals (NCs) used as the optically absorbing material. A first target is to demonstrate light sensitization of the 2D material for energy below its band gap. In such structure the coupling between the two materials is a tunnel coupling. As a result, only the first few layers of NCs in the direct vicinity of the 2D film are transferring charge to the 2D material. More generally, 2D materials present overall low absorption due to their thin character. A second target of this project is to tackle this issue through the introduction of a light resonator which will enhance the light absorption at the absorption wavelength of the NCs. The project will be a collaboration between IMPMC and INSP and will be led by Johan Biscaras.