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Broadband Near-Infrared Persistent Luminescence of Ba[Mg2Al2N4] with Eu2+ and Tm3+ after Red Light Charging

Abstract

A Near Infrared (NIR) persistent luminescent Ba[Mg2Al2N4]:Eu2+-Tm3+ phosphor chargeable by red light was prepared via solid state reaction from all-nitride starting materials. Rietveld refinement shows that the obtained sample correlated well with the standard. The Eu2+:5d-4f broad persistent luminescence band in the range from 600-800 nm can be effectively obtained after charging from a broad wavelength selection range from UV to red light. The Tm3+ acts as the NIR emission center, which consequently expands the persistent luminescence band from 600 to 830 nm by the energy transfer from Eu2+ to Tm3+. The sample was able to be charged by a red light emitting diode (LED), which indicates that electron transfer process occurs from the lowest 5d level of Eu2+ to the electron traps through the conduction band. By the features of red light charging and NIR persistent luminescence, the samples under hams with 1 cm thickness was charged by red component of white light source and its NIR persistent luminescence was detected even through the hams, which proves potential use for biological imaging in the first biological window.

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Publication details

The article was received on 03 Dec 2018, accepted on 23 Dec 2018 and first published on 25 Dec 2018


Article type: Paper
DOI: 10.1039/C8TC06090H
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Broadband Near-Infrared Persistent Luminescence of Ba[Mg2Al2N4] with Eu2+ and Tm3+ after Red Light Charging

    J. Ueda, J. Jr. L. Leaño, C. Richard, K. Asami, S. Tanabe and R. Liu, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC06090H

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