Enhancement of Photoluminescence Quantum Yield and Stability in CsPbBr(3) Perovskite Quantum Dots by Trivalent Doping

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 CsPbBr(3) by ligand-assisted reprecipitation. We show that the photoluminescence (PL) e...

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Detalles Bibliográficos
Autores principales: Jung, Sujeong, Kim, Jae Ho, Choi, Jin Woo, Kang, Jae-Wook, Jin, Sung-Ho, Kang, Youngho, Song, Myungkwan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Communication
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7221998/
https://www.ncbi.nlm.nih.gov/pubmed/32283620
http://dx.doi.org/10.3390/nano10040710
Descripción
Sumario: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 CsPbBr(3) by ligand-assisted reprecipitation. We show that the photoluminescence (PL) emission peak shifts toward shorter wavelengths when doping concentrations are increased. Trivalent metal-doped CsPbBr(3) 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 CsPbBr(3) that underpin their physical properties.

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