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Enhancement of Photoluminescence Quantum Yield and Stability in CsPbBr3 Perovskite Quantum Dots by Trivalent Doping

1
Surface Technology Division, Korea Institute of Materials Science (KIMS), 797 Changwondae-ro, Sungsan-Gu, Gyeongsangnam-do, Changwon 51508, Korea
2
Department of Flexible and Printable Electronics, Polymer Materials Fusion Research Center, Chonbuk National University, Jeonju 54896, Korea
3
Department of Chemistry Education Graduate Department of Chemical Materials Institute for Plastic Information and Energy Materials, Pusan National University, Busan 46241, Korea
4
Materials Data Center, Korea Institute of Materials Science (KIMS), 797 Changwondae-ro, Sungsan-Gu, Gyeongsangnam-do, Changwon 51508, Korea
5
Department of Materials Science and Engineering, Incheon National University, Incheon 22012, Korea
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this project.
Nanomaterials 2020, 10(4), 710; https://doi.org/10.3390/nano10040710
Received: 17 March 2020 / Revised: 3 April 2020 / Accepted: 4 April 2020 / Published: 9 April 2020
(This article belongs to the Special Issue Hybrid Perovskite Thin Film)
We determine the influence of substitutional defects on perovskite quantum dots through experimental and theoretical investigations. Substitutional defects were introduced by trivalent dopants (In, Sb, and Bi) in CsPbBr3 by ligand-assisted reprecipitation. We show that the photoluminescence (PL) emission peak shifts toward shorter wavelengths when doping concentrations are increased. Trivalent metal-doped CsPbBr3 enhanced the PL quantum yield (~10%) and air stability (over 10 days). Our findings provide new insights into the influence of substitutional defects on substituted CsPbBr3 that underpin their physical properties. View Full-Text
Keywords: CsPbBr3; perovskite; nanocrystals; trivalent doping; ligand-assisted reprecipitation CsPbBr3; perovskite; nanocrystals; trivalent doping; ligand-assisted reprecipitation
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MDPI and ACS Style

Jung, S.; Kim, J.H.; Choi, J.W.; Kang, J.-W.; Jin, S.-H.; Kang, Y.; Song, M. Enhancement of Photoluminescence Quantum Yield and Stability in CsPbBr3 Perovskite Quantum Dots by Trivalent Doping. Nanomaterials 2020, 10, 710.

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