Article (Scientific journals)
Strong Dependence of Point Defect Properties in Metal Halide Perovskites on Description of van der Waals Interaction.
Deng, Linjie; Ran, Jingyi; Wang, Bipeng et al.
2024In Journal of Physical Chemistry Letters, 15 (42), p. 10465 - 10472
Peer Reviewed verified by ORBi
 

Files


Full Text
deng-et-al-2024-strong-dependence-of-point-defect-properties-in-metal-halide-perovskites-on-description-of-van-der.pdf
Author postprint (5.99 MB)
Download

All documents in ORBilu are protected by a user license.

Send to



Details



Keywords :
Covalent bonding; Defect property; Electrooptical response; Halide perovskites; Ionic bonding; Optoelectronics property; Reaction pathways; Strong dependences; Van Der Waals interactions; Vibrational dynamics; Materials Science (all); Physical and Theoretical Chemistry
Abstract :
[en] Weaker than ionic and covalent bonding, van der Waals (vdW) interactions can have a significant impact on structure and function of molecules and materials, including stabilities of conformers and phases, chemical reaction pathways, electro-optical response, electron-vibrational dynamics, etc. Metal halide perovskites (MHPs) are widely investigated for their excellent optoelectronic properties, stemming largely from high defect tolerance. Although MHPs are primarily ionic compounds, we demonstrate that vdW interactions contribute ∼5% to the total energy, and that static, dynamics, electronic and optical properties of point defects in MHPs depend significantly on the vdW interaction model used. Focusing on widely studied CsPbBr3 with the common Br vacancy and interstitial defects, we compare the PBE, PBE+D3, PBE+TS, PBE+TS/HI and PBE+MBD-NL models and show that vdW interactions strongly alter the global and local geometric structure, and change the fundamental bandgap, midgap state energies and electron-vibrational coupling. The vdW interaction sensitivity stems from involvement of heavy and highly polarizable chemical elements and the soft MHP structure.
Disciplines :
Chemistry
Author, co-author :
Deng, Linjie;  School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
Ran, Jingyi ;  Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
Wang, Bipeng ;  Department of Chemical Engineering, University of Southern California, Los Angeles, California 90089, United States
BOZIKI, Ariadni  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Computer Science (DCS)
TKATCHENKO, Alexandre  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
Jiang, Jun ;  Key Laboratory of Precision and Intelligent Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
Prezhdo, Oleg V ;  Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States ; Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089, United States
External co-authors :
yes
Language :
English
Title :
Strong Dependence of Point Defect Properties in Metal Halide Perovskites on Description of van der Waals Interaction.
Publication date :
24 October 2024
Journal title :
Journal of Physical Chemistry Letters
eISSN :
1948-7185
Publisher :
American Chemical Society, United States
Volume :
15
Issue :
42
Pages :
10465 - 10472
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
China Scholarship Council
National Science Foundation
Funding text :
L. D. was financially supported by the China Scholarship Council. O. V. P. acknowledges the support of the US National Science Foundation, grant CHE-2154367.
Available on ORBilu :
since 06 November 2025

Statistics


Number of views
3 (0 by Unilu)
Number of downloads
6 (0 by Unilu)

Scopus citations®
 
3
Scopus citations®
without self-citations
2
OpenCitations
 
0
OpenAlex citations
 
3
WoS citations
 
2

Bibliography


Similar publications



Contact ORBilu