Titre :

Photon Reabsorption in Mixed CsPbCl3:CsPbI3 Perovskite Nanocrystal Films for Light-Emitting Diodes

Auteur(s) :

Davis, Nathaniel J. L. K. [Auteur]
University of Cambridge [UK] [CAM]
de la Peña, Francisco [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Tabachnyk, Maxim [Auteur]
University of Cambridge [UK] [CAM]
Richter, Johannes M. [Auteur]
University of Cambridge [UK] [CAM]
Lamboll, Robin D. [Auteur]
University of Cambridge [UK] [CAM]
Booker, Edward P. [Auteur]
University of Cambridge [UK] [CAM]
Wisnivesky Rocca Rivarola, Florencia [Auteur]
University of Cambridge [UK] [CAM]
Griffiths, James T. [Auteur]
University of Cambridge [UK] [CAM]
Ducati, Caterina [Auteur]
University of Cambridge [UK] [CAM]
Menke, S. Matthew [Auteur]
University of Cambridge [UK] [CAM]
Deschler, Felix [Auteur]
University of Cambridge [UK] [CAM]
Greenham, Neil C. [Auteur]
University of Cambridge [UK] [CAM]

Titre de la revue :

The Journal of Physical Chemistry C

Nom court de la revue :

J. Phys. Chem. C

Numéro :

121

Pagination :

3790-3796

Éditeur :

American Chemical Society (ACS)

Date de publication :

2017-02-09

ISSN :

1932-7455

Discipline(s) HAL :

Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Physique [physics]/Physique [physics]/Géophysique [physics.geo-ph]
Physique [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Sciences de la Terre

Résumé en anglais : [en]

Cesium lead halide nanocrystals, CsPbX3 (X = Cl, Br, I), exhibit photoluminescence quantum efficiencies approaching 100% without the core–shell structures usually used in conventional semiconductor nanocrystals. These high ...
Lire la suite >Cesium lead halide nanocrystals, CsPbX3 (X = Cl, Br, I), exhibit photoluminescence quantum efficiencies approaching 100% without the core–shell structures usually used in conventional semiconductor nanocrystals. These high photoluminescence efficiencies make these crystals ideal candidates for light-emitting diodes (LEDs). However, because of the large surface area to volume ratio, halogen exchange between perovskite nanocrystals of different compositions occurs rapidly, which is one of the limiting factors for white-light applications requiring a mixture of different crystal compositions to achieve a broad emission spectrum. Here, we use mixtures of chloride and iodide CsPbX3 (X = Cl, I) perovskite nanocrystals where anion exchange is significantly reduced. We investigate samples containing mixtures of perovskite nanocrystals with different compositions and study the resulting optical and electrical interactions. We report excitation transfer from CsPbCl3 to CsPbI3 in solution and within a poly(methyl methacrylate) matrix via photon reabsorption, which also occurs in electrically excited crystals in bulk heterojunction LEDs.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Matériaux Terrestres et Planétaires

Date de dépôt :

2024-02-01T09:36:28Z
2024-02-02T10:14:36Z