Journal article
Modulating Charge-Carrier Dynamics in Mn-Doped All-Inorganic Halide Perovskite Quantum Dots through the Doping-Induced Deep Trap States
Department of Chemistry, Technical University of Denmark1
Department of Energy Conversion and Storage, Technical University of Denmark2
Atomic Scale Materials Modelling, Department of Energy Conversion and Storage, Technical University of Denmark3
Lund University4
Chinese Academy of Sciences5
Center for Hyperpolarization in Magnetic Resonance, Centers, Technical University of Denmark6
German Electron Synchrotron7
Transition-metal ion doping has been demonstrated to be effective for tuning the photoluminescence properties of perovskite quantum dots (QDs). However, it would inevitably introduce defects in the lattice. As the Mn concentration increases, the Mn dopant photoluminescence quantum yield (PLQY) first increases and then decreases.
Herein the influence of the dopant and the defect states on the photophysics in Mn-doped CsPbCl3 QDs was studied by time-resolved spectroscopies, whereas the energy levels of the possible defect states were analyzed by density functional theory calculations. We reveal the formation of deep interstitials defects (Cli) by Mn2+ doping.
The depopulation of initial QD exciton states is a competition between exciton-dopant energy transfer and defect trapping on an early time scale (
Language: | English |
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Publisher: | American Chemical Society |
Year: | 2020 |
Pages: | 3705-3711 |
ISSN: | 19487185 |
Types: | Journal article |
DOI: | 10.1021/acs.jpclett.0c01050 |
ORCIDs: | Meng, Jie , Lan, Zhenyun , 0000-0002-6875-5886 , 0000-0001-9583-921X , Mossin, Susanne , 0000-0002-1854-7026 , Castelli, Ivano Eligio , 0000-0003-4337-8129 , 0000-0003-1428-5564 , Zheng, Kaibo and Gutierrez Alvarez, Sol Laura |