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• W1966322025 endingPage "7059" @default.
• W1966322025 startingPage "7052" @default.
• W1966322025 abstract "Luminescent perovskite nanosheets were prepared by exfoliation of single- or double- layered perovskite oxides, K2Ln2Ti3O10, KLnNb2O7, and RbLnTa2O7 (Ln: lanthanide ion). The thickness of the individual nanosheets corresponded to those of the perovskite block in the parent layered compounds. Intense red and green emissions were observed in aqueous solutions with Gd1.4Eu0.6Ti3O10- and La0.7Tb0.3Ta2O7-nanosheets, respectively, under UV illumination with energies greater than the corresponding host oxide band gap. The coincidence of the excitation spectrum and the band gap absorbance indicates that the visible emission results from energy transfer within the nanosheet. The red emission intensity of the Gd1.4Eu0.6Ti3O10-nanosheets was much stronger than that of the La0.90Eu0.05Nb2O7-nanosheets reported previously. The strong emission intensity is a result of a two-step energy transfer cascade within the nanosheet from the Ti−O network to Gd3+ and then to Eu3+. The emission intensities of the Gd1.4Eu0.6Ti3O10- and La0.7Tb0.3Ta2O7-nanosheets can be modulated by applying a magnetic field (1.3−1.4 T), which brings about a change in orientation of the nanosheets in solution. The emission intensities increased when the excitation light and the magnetic field directions were perpendicular to each other, and they decreased when the excitation and magnetic field were collinear and mutually perpendicular to the direction of detection of the emitted light." @default.
• W1966322025 created "2016-06-24" @default.
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• W1966322025 date "2008-05-08" @default.
• W1966322025 modified "2023-10-02" @default.
• W1966322025 title "Photoluminescence of Perovskite Nanosheets Prepared by Exfoliation of Layered Oxides, K₂Ln₂Ti₃O₁₀, KLnNb₂O₇, and RbLnTa₂O₇ (Ln: Lanthanide Ion)" @default.
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• W1966322025 doi "https://doi.org/10.1021/ja7114772" @default.
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