Title :

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

Author(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]

Journal title :

The Journal of Physical Chemistry C

Abbreviated title :

J. Phys. Chem. C

Volume number :

121

Pages :

3790-3796

Publisher :

American Chemical Society (ACS)

Publication date :

2017-02-09

ISSN :

1932-7455

HAL domain(s) :

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

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Matériaux Terrestres et Planétaires

Submission date :

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