Identification of 
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 as Electron Trap in Persistent Phosphors

Joos, Jonas; Korthout, Katleen; Amidani, Lucia; Glatzel, Pieter; Poelman, Dirk; Smet, Philippe

doi:10.1103/physrevlett.125.033001

Cited by 84 publications

(81 citation statements)

References 58 publications

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“…After crossing a thermal barrier, the electron can eventually be trapped at a meta‐stable “trap” level in the band gap (created by, e.g., oxygen vacancies or co‐dopants). [ 61–64 ] With BaSiON now in a charged state (filled electron traps), delayed emission can occur when external energy is supplied to the phosphor. This energy can be the result of electromagnetic radiation, heat, electric fields, etc.…”

Section: Resultsmentioning

confidence: 99%

Fast and High‐Resolution Ultrasound Pressure Field Mapping Using Luminescent Membranes

Michels

Kersemans

Versluis

et al. 2021

Advanced Optical Materials

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Ultrasound is used extensively in medical imaging and therapy, non‐destructive testing, flow sensing, underwater range assessment, and acoustic microscopy. To ensure the accuracy of these techniques, detailed knowledge of the acoustic pressure field produced by the ultrasonic transducer is required. This paper proposes a functional polymer membrane loaded with ultrasound‐activated luminescent microparticles. The semitransparent membrane makes use of the luminescent properties of BaSi2O2N2:Eu2+ to convert ultrasonic pressure into visible light in a fast and straightforward way, through a process termed acoustically produced luminescence (APL). APL is shown to work within a wide range of acoustic frequencies (1–25 MHz) and pressures (50 kPa–4.5 MPa), and enables a quantitative characterization of ultrasound fields with a lateral spatial resolution below 200 µm. At the investigated pressures and frequencies, the light generation mechanism is essentially related to ultrasonic heating rather than mechanical stimulation. These membranes offer effective field mapping possibilities, much faster than conventional time consuming point‐by‐point hydrophone scanning.

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Section: Resultsmentioning

confidence: 99%

Fast and High‐Resolution Ultrasound Pressure Field Mapping Using Luminescent Membranes

Michels

Kersemans

Versluis

et al. 2021

Advanced Optical Materials

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“…Thus, the divalent energy level positions related to the conduction band would determine the amount of thermal energy needed for depopulating the traps. Recently, Joos and co-workers [ 159 ] investigated the Sr 2 MgSi 2 O 7 :Eu 2+ , Dy 3+ material and identified the reversible Dy 3+ reduction during irradiation combining laser excitation and X-ray spectroscopy, proving that co-dopants act also as electron traps. This trapping property of the RE 3+ co-dopants is efficient only when the energy level of the correspondent RE 2+ ion is below the conduction band with appropriate energy.…”

Section: Persistent Luminescencementioning

confidence: 99%

Opportunities for Persistent Luminescent Nanoparticles in Luminescence Imaging of Biological Systems and Photodynamic Therapy

et al. 2020

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The use of luminescence in biological systems allows us to diagnose diseases and understand cellular processes. Persistent luminescent materials have emerged as an attractive system for application in luminescence imaging of biological systems; the afterglow emission grants background-free luminescence imaging, there is no need for continuous excitation to avoid tissue and cell damage due to the continuous light exposure, and they also circumvent the depth penetration issue caused by excitation in the UV-Vis. This review aims to provide a background in luminescence imaging of biological systems, persistent luminescence, and synthetic methods for obtaining persistent luminescent materials, and discuss selected examples of recent literature on the applications of persistent luminescent materials in luminescence imaging of biological systems and photodynamic therapy. Finally, the challenges and future directions, pointing to the development of compounds capable of executing multiple functions and light in regions where tissues and cells have low absorption, will be discussed.

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“…Since its discovery in 1996 [3] many different models for the afterglow mechanism have been proposed. [5][6][7][8][9] Despite extensive research of many scientists, so far none of the proposed mechanisms can explain all experimental findings of the last 25 years, and the true mechanism remains to be found. It is mostly agreed upon that under illumination of the materials, electrons from the excited europium ions are transferred to and caught in different so-called trap-states.…”

Section: Swiss Super-luminova ®mentioning

confidence: 99%

Radiochemical Applications in Industry – A Journey through Time with RC Tritec

Zeller¹,

Gartmann²,

Zeltner³

2020

Chimia

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Over the course of time, radioactive applications have changed from miracle cures to a material that is treated with caution in public perception. As a Swiss company, which has always been working with radioactive materials, RC Tritec is an interesting example how the applications in private industry have changed over the years: The company was originally a Ra-226 activated luminous paint manufacturer which managed to become a leader in the field of tritium labelling, the construction of manifolds for the handling of ionizing gases, source production and neutron imaging.

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Identification of Dy3+/Dy2+ as Electron Trap in Persistent Phosphors

Cited by 84 publications

References 58 publications

Fast and High‐Resolution Ultrasound Pressure Field Mapping Using Luminescent Membranes

Fast and High‐Resolution Ultrasound Pressure Field Mapping Using Luminescent Membranes

Opportunities for Persistent Luminescent Nanoparticles in Luminescence Imaging of Biological Systems and Photodynamic Therapy

Radiochemical Applications in Industry – A Journey through Time with RC Tritec

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