The luminescence study of SrAl11.88−xGaxO19:0.12Cr3+ coumpounds. - Open Research Data - Bridge of Knowledge

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The luminescence study of SrAl11.88−xGaxO19:0.12Cr3+ coumpounds.

Description

Portable near-infrared (NIR) light sources are in high demand for applications in spectroscopy, night vision, bioimaging, and many others. Typical phosphor designs feature isolated Cr3+ ion centers, and it is challenging to design broadband NIR phosphors based on Cr3+–Cr3+ pairs. Here, we explore the solid-solution series SrAl11.88–xGaxO19:0.12Cr3+ (x = 0, 2, 4, 6, 8, 10, and 12) as phosphors featuring Cr3+–Cr3+ pairs and evaluate structure-property relations within the series. We establish the incorporation of Ga within the magentoplumbite-type structure at five distinct crystallographic sites and evaluate the effect of this incorporation on the Cr3+–Cr3+ ion pair proximity. The presence of both isolated Cr3+ and Cr3+–Cr3+ pairs, resulting in NIR luminescence at approximately 650–1050 nm. Unexpectedly, the origin of broadband NIR luminescence with a peak within the range 740–820 nm is related to the Cr3+–Cr3+ ion pair. We demonstrate the application of the SrAl5.88Ga6O19:0.12Cr3+ phosphor, which possesses an internal quantum efficiency of ∼85%, a radiant flux of ∼95 mW, and zero thermal quenching up to 500 K. This work provides a further understanding of spectral shifts in phosphor solid solutions and in particular the application of the magentoplumbites as promising next-generation NIR phosphor host systems.

In that dataset, the scientific article with Supporting Information, raw data of excitation and emission spectra, decay profiles, and temperature- and pressure-dependent photoluminescence and decay profiles are provided.

Dataset file

Chromium Ion Pair Luminescence A Strategy in Broadband Near-Infrared Light-Emitting Diode Design.rar
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File details

License:
Creative Commons: by 4.0 open in new tab
CC BY
Attribution
Raw data:
Data contained in dataset was not processed.
Software:
HPD-TA, OriginLab

Details

Year of publication:
2021
Verification date:
2022-01-26
Dataset language:
English
Fields of science:
  • physical sciences (Natural sciences)
DOI:
DOI ID 10.34808/hv3x-cb07 open in new tab
Verified by:
No verification

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