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Double perovskite Cs2AgInCl6:Cr3+: broadband and near-infrared luminescent materials

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Abstract

Searching for high performance and broader applications of inorganic halide perovskites has drawn extensive attention. In this work, a Cr3+-doped halide perovskite, Cs2AgInCl6:Cr3+, which exhibits broadband near-infrared (NIR) emission is first obtained via the traditional high temperature solid-state reaction. A broad emission band ranging from 850 to 1350 nm centered at 1010 nm with a full-width at half-maximum (FWHM) of 180 nm is assigned to the spin-allowed 4T24A2 transition of octahedrally coordinated Cr3+ ions in a very weak crystal-field environment. The excitation bands centered at 353, 565 and 800 nm can be attributed to the absorption of the Cs2AgInCl6 host, the Cr3+ d–d transitions of 4A24T1 and 4A24T2, respectively. Upon 760 nm excitation, the photoluminescence quantum yield (PLQY) of Cs2AgIn0.9Cl6:0.1Cr3+ is about ∼22.03%. Cs2AgInCl6:Cr3+ phosphors with such broadband NIR emission have potential in phosphor converted light emitting diodes (pc-LEDs) which have applications in bioimaging and biomonitoring.

Graphical abstract: Double perovskite Cs2AgInCl6:Cr3+: broadband and near-infrared luminescent materials

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Publication details

The article was received on 22 Jul 2019, accepted on 13 Oct 2019 and first published on 14 Oct 2019


Article type: Research Article
DOI: 10.1039/C9QI00905A
Inorg. Chem. Front., 2019, Advance Article

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    Double perovskite Cs2AgInCl6:Cr3+: broadband and near-infrared luminescent materials

    F. Zhao, Z. Song, J. Zhao and Q. Liu, Inorg. Chem. Front., 2019, Advance Article , DOI: 10.1039/C9QI00905A

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