Engineering Bicolor Emission in 2D Core/Crown CdSe/CdSe 1– x Te x Nanoplatelet Heterostructures Using Band-Offset Tuning

Marion Dufour (1) , Violette Steinmetz (2) , Eva Izquierdo (1) , Thomas Pons (1) , Nicolas Lequeux (1) , Emmanuel Lhuillier (3) , Laurent Legrand (2) , Maria Chamarro (2) , Thierry Barisien (2) , Sandrine Ithurria (1)

1 LPEM - Laboratoire de Physique et d'Etude des Matériaux (UMR 8213)
2 INSP-E12 - Photonique et cohérence de spin
3 INSP-E6 - Physico-chimie et dynamique des surfaces

Colloidal quantum dots (QDs) are now being used as the new generation of phosphor for displays. White light is obtained by combining the blue emission of a diode with green and red population of QDs. Having bicolor emission within a single nanocrystal population can be even more convenient. Here, we demonstrate that bicolor emission can be obtained from 2D nanoplatelets (NPLs) with a core/crown geometry. In CdSe/CdTe NPLs with type II band alignment, only the charge transfer emission was observed so far due to the very fast (

Mots clés: nanoplatelets; cadmium chalcogenides; bi color emission; colloidal heterostructure; exciton transport

Domaines: Matériaux; Matière Condensée [cond-mat]

Marion Dufour, Violette Steinmetz, Eva Izquierdo, Thomas Pons, Nicolas Lequeux, et al.. Engineering Bicolor Emission in 2D Core/Crown CdSe/CdSe 1– x Te x Nanoplatelet Heterostructures Using Band-Offset Tuning. Journal of Physical Chemistry C, 2017, 121 (44), pp.24816 - 24823. ⟨10.1021/acs.jpcc.7b06527⟩. ⟨hal-01668079⟩