Ultrafast and slow Mn2+ luminescence in lithium tetraborate

Danilkin, M. I.; Vereschagina, N. Yu.; Vainer, Yu. G.; Kochiev, M. V.; Ambrozevich, S. A.; Romet, Ivo; Mändar, Hugo; Морозов, А. Н.; Repeev, Yu. A.; Spassky, D.; Ustinovskii, N. N.; Селезнев, Л. В.; Mokrousova, D. V.; Selyukov, A. S.

doi:10.1016/j.jallcom.2021.160852

Cited by 7 publications

(3 citation statements)

References 69 publications

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“…The observed peak was similar to that of the scintillation spectra; thus, the OSL was attributable to the 4 T 1 → 6 A 1 transition of Mn 2+ . 26) The 0.1% MnCl 2 -doped Ca 2 BO 3 Cl exhibited the largest OSL intensity as well as the scintillation spectra. Further, the minimum measurable dose of the 0.1% MnCl 2 -doped Ca 2 BO 3 Cl was 1 Gy, and the value was higher than that of previously reported OSL materials such as C-doped Al 2 O 3 .…”

Section: Resultsmentioning

confidence: 88%

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Dosimetric properties of Mn²⁺-doped Ca₂BO₃Cl

Wauke

Koide

Kawano

et al. 2022

Jpn. J. Appl. Phys.

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We synthesized Ca2BO3Cl with various amounts of MnCl2 to fabricate phosphors for radiation dosimetry. After the synthesis, we evaluated their scintillation, thermally-stimulated luminescence (TSL), and optical stimulated luminescence (OSL) characteristics. A scintillation peak derived from the 4T1→6A1 transition of Mn2+ appeared at approximately 600 nm in the MnCl2-doped Ca2BO3Cl. Further, their decay time constants were approximately 0.13 ms that should be ascribed to the 4T1→6A1 transition. Moreover, the MnCl2-doped Ca2BO3Cl exhibited TSL glow peaks at approximately 85, 170, and 280 °C. The linear response of the 0.1% MnCl2-doped Ca2BO3Cl was confirmed in the X-ray dose range of 10–3000 mGy. In addition, a weak OSL peak derived from the 4T1→6A1 transition was detected at around 600 nm from the 0.1% and 0.5% MnCl2-doped Ca2BO3Cl.

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Section: Resultsmentioning

confidence: 88%

“…The peak top wavelength was consistent with common values of the 4 T 1 → 6 A 1 transition of Mn 2+ . 26) The 0.1% MnCl 2 -doped Ca 2 BO 3 Cl exhibited the highest intensity, and the scintillation intensity decreased with the MnCl 2 concentration. This might originate from the concentration quenching.…”

Section: Resultsmentioning

confidence: 89%

Dosimetric properties of Mn²⁺-doped Ca₂BO₃Cl

Wauke

Koide

Kawano

et al. 2022

Jpn. J. Appl. Phys.

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“…[31][32][33] As an effective approach to improve the performance of nanomaterials, doping with transition metal ions has been widely explored to modulate the optical, electrical and magnetic performances via introducing strong exchange interactions of the d orbit electrons with charge carriers of the host semiconductors and activating forbidden transition in the host materials. [34][35][36][37][38][39] Taking the most representative Mn 2+ ion as an example, the replacement of Pb 2+ with Mn 2+ in CsPbX 3 perovskite can generate intense sensitized dopant luminescence to boost photoluminescence (PL) efficiency by introducing new carriers transition pathway, and stabilize specific crystallographic phases by increasing crystal formation energy. [40][41][42][43] Motivated by these achievements, herein, we for the first time introduce Mn 2+ ions into the highly localized [Cu 2 I 5 ] 3− units of 0D Cs 3 Cu 2 I 5 NSs via a facile hot injection method, with an aim to simultaneously improve their scintillator efficiency and environmental stability.…”

Section: Introductionmentioning

confidence: 99%

Mn²⁺‐Activated Cs₃Cu₂I₅ Nano‐Scintillators for Ultra‐High Resolution Flexible X‐Ray Imaging

Wang

Wei

Liu

et al. 2023

Laser & Photonics Reviews

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Zero‐dimensional (0D) copper‐based perovskite‐derivative nano‐scintillators (NSs), as a promising non‐toxic alternative to lead‐based halide perovskite, have shown great potential in flexible X‐ray detection and imaging. However, their practical applications are still impeded by low X‐ray imaging resolution associated with inadequate radioluminescence (RL) and poor environmental stability. Herein, for the first time a simple but valid Mn2+‐activation strategy is proposed to highly enhance the RL and stability of 0D Cs3Cu2I5 NSs, where the Mn2+ ions are embedded into the highly localized [Cu2I5]3− units by utilizing a modified hot‐injection method. As such, a newly emerged emission band of Mn2+ ion centered at ≈562 nm coupled with much improved intrinsic self‐trapped excitons (STE) emission of the 0D Cs3Cu2I5 host peaking at ≈445 nm can be achieved in these resultant Mn2+‐activated 0D Cs3Cu2I5 NSs, thereby delivering a light yield of 71 000 photons MeV−1 that is much superior to their lead‐based perovskite counterparts and commercial scintillators. As a consequence, X‐ray detectors made of these Mn2+‐activated NSs implement an ultrahigh X‐ray imaging resolution of 16.2 line pairs mm−1 and an ultra‐low detection limit of 127.5 nGyair s−1, highlighting their potential as promising candidates for flexible X‐ray detection and imaging.

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