Realizing nondestructive luminescence readout in photochromic ceramics <i>via</i> deep ultraviolet excitation for optical information storage

Yang, Zetian; Hu, Jieqi; Martin, Lisa I. D. J.; Heggen, David Van der; Poelman, Dirk

doi:10.1039/d1tc03946f

Cited by 20 publications

(12 citation statements)

References 65 publications

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“…The net effect of these two competing processes depends on the absorption abilities of the two different species that initiate the two opposite processes, which effectively limits the final concentration of Eu 2+ that can be obtained by photo-reduction with a certain illumination wavelength. This is similar to what has been observed in persistent (or OSL) phosphors with the competition between trapping and detrapping or photochromic materials with the competition between coloring and decoloring. − It is important to mention that in this region of overlap, the same equilibrium is obtained independent of whether the phosphor is initially in a maximally reduced or maximally oxidized state.…”

Section: Resultssupporting

confidence: 78%

To Luminesce or to Change Valence? Insight into the Wavelength Dependency of the Reversible Valence Switching of Europium in Sr₃SiO₅

Yang

Feng

et al. 2022

J. Phys. Chem. C

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A good control over the valence state of dopants in luminescent materials or phosphors is important for the development of highly efficient phosphors for white light-emitting diodes (LEDs). Detailed spectroscopic studies allow us to reveal optically induced charge transfer processes and elucidate the underlying mechanisms in phosphors with additional functionalities such as photochromism or persistent luminescence. However, the spectroscopic study of the valence switching of europium has scarcely been reported. Here, we report on the Sr3SiO5:Eu phosphor, in which photo-reduction (Eu3+ → Eu2+) and photo- or thermal-oxidation (Eu2+ → Eu3+) reactions are demonstrated. The variation of the illumination wavelength influences the efficiency of both the photo-reduction/oxidation and the accompanying dynamic process, especially when the two opposite reactions occur simultaneously. Temperature-dependent annealing indicates a large trap depth for the electron trapped by Eu3+. The good stability of Eu2+ obtained by photo-reduction and the repeatability of the Eu2+/Eu3+ valence switching are confirmed as well. Furthermore, the application of optical information storage is demonstrated based on this phosphor. The results of this work may not only improve the understanding of Eu2+/Eu3+ valence change during illumination but also allow the development of new functional luminescent materials.

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Section: Resultssupporting

confidence: 78%

To Luminesce or to Change Valence? Insight into the Wavelength Dependency of the Reversible Valence Switching of Europium in Sr₃SiO₅

Yang

Feng

et al. 2022

J. Phys. Chem. C

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“…Photochromic materials have emerged as promising candidates for many advanced applications including three-dimensional information encryption and volumetric displays. [1][2][3][4] Compared to organic photochromic molecules, inorganic compounds feature an enhanced chemical stability, a robust reversibility, and a high recovering speed, leading to a magnitude of applications in photonic sensors, 5,6 color-tunable windows, 7,8 and anti-counterfeiting. [9][10][11] In particular, photochromic glass could be completely recovered after many coloration-decoloration cycles, which has inspired the design of a compact platform for optical storage.…”

Section: Introductionmentioning

confidence: 99%

The making and breaking of perovskite photochromism through doping

Zheng

Zhang

2022

Nanoscale

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“…Such a competition is also observed in certain other photochromic materials and persistent phosphors. [ 76,77 ]…”

Section: Resultsmentioning

confidence: 99%

A Versatile Photochromic Dosimeter Enabling Detection of X‐Ray, Ultraviolet, and Visible Photons

Yang

Heggen

et al. 2023

Laser & Photonics Reviews

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An accurate measurement of radiation doses is required to ensure efficient use of electromagnetic radiation in medical diagnostics, agriculture, or general lighting applications. Yet, existing dosimeters usually face the issues of cumbersome manipulation, time-consuming analysis, or power-supply requirement. Here, an all-round dosimeter is reported based on BaMgSiO 4 , a photochromic material that exhibits a reversible white-pink color change upon irradiation. Electron paramagnetic resonance measurements under in situ coloring and bleaching reveal that the charge carrier trapping and detrapping at oxygen vacancy-related defects determine the photochromic behavior. This can be utilized for dosimetry of X-rays, ultraviolet, and visible light, as the coloring and bleaching are dependent on the irradiation wavelength and the dose. The distinct color variation of BaMgSiO 4 allows for on-site measurement of irradiation doses by a colorimetric method, and the special wavelength-responsive behavior in the ultraviolet region is suitable for personal solar ultraviolet light monitoring. By virtue of good stability and excellent cycling robustness, BaMgSiO 4 can be an ideal integrating detector for X-rays, ultraviolet, and visible light dosimetry. A prototype device is also developed for long-duration daylight measurements. These findings enhance the understanding of the photochromic behavior in inorganic materials and can stimulate the exploration of new photochromic dosimeters.

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Realizing nondestructive luminescence readout in photochromic ceramics via deep ultraviolet excitation for optical information storage

Abstract: Photochromic materials exhibiting luminescence modulation behavior are regarded as promising for high-density optical information storage media. During the luminescence readout process however, many of these materials are subject to coloration...

Cited by 20 publications

References 65 publications

To Luminesce or to Change Valence? Insight into the Wavelength Dependency of the Reversible Valence Switching of Europium in Sr₃SiO₅

To Luminesce or to Change Valence? Insight into the Wavelength Dependency of the Reversible Valence Switching of Europium in Sr₃SiO₅

The making and breaking of perovskite photochromism through doping

A Versatile Photochromic Dosimeter Enabling Detection of X‐Ray, Ultraviolet, and Visible Photons

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Realizing nondestructive luminescence readout in photochromic ceramics via deep ultraviolet excitation for optical information storage

Abstract: Photochromic materials exhibiting luminescence modulation behavior are regarded as promising for high-density optical information storage media. During the luminescence readout process however, many of these materials are subject to coloration...

Cited by 20 publications

References 65 publications

To Luminesce or to Change Valence? Insight into the Wavelength Dependency of the Reversible Valence Switching of Europium in Sr3SiO5

To Luminesce or to Change Valence? Insight into the Wavelength Dependency of the Reversible Valence Switching of Europium in Sr3SiO5

The making and breaking of perovskite photochromism through doping

A Versatile Photochromic Dosimeter Enabling Detection of X‐Ray, Ultraviolet, and Visible Photons

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Product

Resources

About

To Luminesce or to Change Valence? Insight into the Wavelength Dependency of the Reversible Valence Switching of Europium in Sr₃SiO₅

To Luminesce or to Change Valence? Insight into the Wavelength Dependency of the Reversible Valence Switching of Europium in Sr₃SiO₅