Library of Two-Dimensional Hybrid Lead ...
Document type :
Article dans une revue scientifique: Article original
Title :
Library of Two-Dimensional Hybrid Lead Halide Perovskite Scintillator Crystals
Author(s) :
Xie, Aozhen [Auteur]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Nanyang Technological University [Singapour] [NTU]
Maddalena, Francesco [Auteur]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Nanyang Technological University [Singapour] [NTU]
Witkowski, Marcin [Auteur]
Nicolaus Copernicus University [Toruń]
Makowski, Michal [Auteur]
Nicolaus Copernicus University [Toruń]
Mahler, Benoit [Auteur]
iLM - Luminescence [iLM - LUMINESCENCE]
Drozdowski, Winicjusz [Auteur]
Nicolaus Copernicus University [Toruń]
Springham, Stuart Victor [Auteur]
Coquet, Philippe [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Nanyang Technological University [Singapour] [NTU]
Dujardin, Christophe [Auteur correspondant]
iLM - Luminescence [iLM - LUMINESCENCE]
Birowosuto, Muhammad Danang [Auteur correspondant]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Nanyang Technological University [Singapour] [NTU]
Dang, Cuong [Auteur correspondant]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Nanyang Technological University [Singapour] [NTU]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Nanyang Technological University [Singapour] [NTU]
Maddalena, Francesco [Auteur]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Nanyang Technological University [Singapour] [NTU]
Witkowski, Marcin [Auteur]
Nicolaus Copernicus University [Toruń]
Makowski, Michal [Auteur]
Nicolaus Copernicus University [Toruń]
Mahler, Benoit [Auteur]
iLM - Luminescence [iLM - LUMINESCENCE]
Drozdowski, Winicjusz [Auteur]
Nicolaus Copernicus University [Toruń]
Springham, Stuart Victor [Auteur]
Coquet, Philippe [Auteur]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Nanyang Technological University [Singapour] [NTU]
Dujardin, Christophe [Auteur correspondant]

iLM - Luminescence [iLM - LUMINESCENCE]
Birowosuto, Muhammad Danang [Auteur correspondant]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Nanyang Technological University [Singapour] [NTU]
Dang, Cuong [Auteur correspondant]
CNRS International - NTU - Thales Research Alliance [CINTRA]
Nanyang Technological University [Singapour] [NTU]
Journal title :
Chemistry of Materials
Pages :
8530-8539
Publisher :
American Chemical Society
Publication date :
2020-10-13
ISSN :
0897-4756
English keyword(s) :
Crystals
X-rays
Anions
Light
Perovskites
X-rays
Anions
Light
Perovskites
HAL domain(s) :
Sciences de l'ingénieur [physics]
Chimie
Physique [physics]
Chimie
Physique [physics]
English abstract : [en]
Two-dimensional (2D) hybrid lead halide perovskites are potential candidates for high light yield scintillators as they have small band gaps between 3 and 4 eV and large exciton-binding energy. Here, we discuss the ...
Show more >Two-dimensional (2D) hybrid lead halide perovskites are potential candidates for high light yield scintillators as they have small band gaps between 3 and 4 eV and large exciton-binding energy. Here, we discuss the scintillation properties from a total of 11 organic/inorganic hybrid perovskite crystals with two already reported crystals, (PEA)<sub>2</sub>PbBr<sub>4</sub> and (EDBE)PbBr<sub>4</sub>. Their photoluminescence and X-ray luminescence (XL) spectra are dominated by narrow and broad band emissions, and they correspond to free exciton and self-trapped exciton, respectively. The lifetimes derived from time-resolved XL strongly vary from 0.6 to 17.0 ns. These values make this type of compound among the fastest scintillators. For the light yield derived from the XL, we found that only (PEA)<sub>2</sub>PbBr<sub>4</sub>, (EDBE)PbBr<sub>4</sub>, and (BA)<sub>2</sub>PbBr<sub>4</sub> crystals have light yields between 10,000 and 40,000 photons/MeV. The mechanisms for thermal quenching and afterglow are discussed in order to optimize the light yields. With gamma-ray excitation, we reported the best energy resolution of 7.7% at 662 keV with excellent proportionality. Finally, this study paves the way toward the ultimate high light yield and fast scintillators for medical and homeland security applications.Show less >
Show more >Two-dimensional (2D) hybrid lead halide perovskites are potential candidates for high light yield scintillators as they have small band gaps between 3 and 4 eV and large exciton-binding energy. Here, we discuss the scintillation properties from a total of 11 organic/inorganic hybrid perovskite crystals with two already reported crystals, (PEA)<sub>2</sub>PbBr<sub>4</sub> and (EDBE)PbBr<sub>4</sub>. Their photoluminescence and X-ray luminescence (XL) spectra are dominated by narrow and broad band emissions, and they correspond to free exciton and self-trapped exciton, respectively. The lifetimes derived from time-resolved XL strongly vary from 0.6 to 17.0 ns. These values make this type of compound among the fastest scintillators. For the light yield derived from the XL, we found that only (PEA)<sub>2</sub>PbBr<sub>4</sub>, (EDBE)PbBr<sub>4</sub>, and (BA)<sub>2</sub>PbBr<sub>4</sub> crystals have light yields between 10,000 and 40,000 photons/MeV. The mechanisms for thermal quenching and afterglow are discussed in order to optimize the light yields. With gamma-ray excitation, we reported the best energy resolution of 7.7% at 662 keV with excellent proportionality. Finally, this study paves the way toward the ultimate high light yield and fast scintillators for medical and homeland security applications.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Source :