| Title: |
Expanding the color palette of bicolor-emitting nanocrystals |
| Authors: |
Dabard, Corentin; Po, Hong; Fu, Ningyuan; Makke, Lina; Lehouelleur, Henri; Curti, Leonardo; Xiangzhen, Xu; Lhuillier, Emmanuel; Diroll, Benjamin; Ithurria, Sandrine |
| Contributors: |
Laboratoire de Physique et d'Etude des Matériaux (UMR 8213) (LPEM); Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris); Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Physico-chimie et dynamique des surfaces (INSP-E6); Institut des Nanosciences de Paris (INSP); Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Argonne National Laboratory Lemont (ANL); ANR-21-CE24-0012,BRIGHT,Diode électroluminescente infrarouge brillante par exaltation du couplage lumière-matière(2021); ANR-19-CE24-0022,COPIN,Détecteur plasmonique à nanoCristaux colloïdaux: une nouvelle filière pour l'OPtoélectronique INfrarouge(2019); ANR-19-CE09-0017,FRONTAL,Nanocristaux Colloïdaux Dopés Infrarouges(2019); ANR-19-CE09-0026,GRaSkop,Tuning Giant Rashba Spin-Orbit Coupling in Polar Single Layer Transition Metal Dichalcogenides(2019); ANR-22-CE09-0018,QuickTera,Nanocristaux de HgTe une nouvelle plateforme pour l'optoélectronique THz(2022); ANR-21-CE09-0029,MixDFerro,Heterostructures à dimensions mixtes sous contrôle ferroélectrique 2D(2021); ANR-20-ASTR-0008,NITquantum,Design et fabrication d'un plan focal dans le proche infrarouge à base de nanocrisrtaux(2020); European Project: 853049,ERC-2019-STG,ERC-2019-STG,Ne2DeM(2020); European Project: 756225,ERC-2017-STG,ERC-2017-STG,blackQD(2018); European Project: 101086358,ERC-2022-COG,ERC-2022-COG,AQDtive(2024) |
| Source: |
ISSN: 2040-3364. |
| Publisher Information: |
CCSD; Royal Society of Chemistry |
| Publication Year: |
2023 |
| Subject Terms: |
nanoplatelets; photoluminescence; bicolor emission; optical spectroscopy; [CHIM.MATE]Chemical Sciences/Material chemistry |
| Description: |
International audience ; Thanks to their bright and tunable luminescence spectra, nanocrystals appear as a unique playground for light source design. Displays and lightnings require white light sources that combine several narrow lines. As Kasha's rule prevents the emission of hot carriers, blends of multiple nanocrystals populations are currently the evident strategy for broad band source design. However, a few reports suggest that bicolor emission can also be obtained from a single particle even under weak excitation, if a careful design of the exciton scattering mechanism sufficiently slows down its relaxation pathways. A key challenge remains to maintain quantum confinement for color tunability in the same structure, while simultaneously achieving a large size to leverage the critical, slower exciton diffusion or relaxation down to the ground state. Here, we demonstrate that 2D nanoplatelets offer an original opportunity for the design of confined and yet large heterostructures. We demonstrate that bicolor emission is not limited to green-red pair and show that blue-yellow as well as purple-green emissions, can be obtained respectively from CdSe/CdTe/CdSe core/crown/crown and CdSe/CdS core/crown heterostructures. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/grantAgreement//853049/EU/Creating the new generation of 2D light emitters/Ne2DeM; info:eu-repo/grantAgreement//756225/EU/Optoelectronic of narrow band gap nanocrystals/blackQD; info:eu-repo/grantAgreement//101086358/EU/Toward active nanophotonic using colloidal quantum dots/AQDtive |
| DOI: |
10.1039/D3NR03235C |
| Availability: |
https://hal.science/hal-04183472; https://hal.science/hal-04183472v1/document; https://hal.science/hal-04183472v1/file/morebicolor_v15.pdf; https://doi.org/10.1039/D3NR03235C |
| Rights: |
info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.FC7D71E3 |
| Database: |
BASE |