Effects of two strategies on afterglow behavior of Lu2O3:Eu single crystal scintillator: Co-doping with Pr3+ and solid solution with Sc2O3

Xue, Zhongjun; Ding, Dongzhou; Sima, Yating; Zhou, Zhenghua; Dong, Hanrui; Zhao, Shuwen; He, Feng

doi:10.1016/j.jre.2022.03.012

Cited by 8 publications

(2 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thanks to the heavy atoms (Cs, Hf, Te) response for the absorption of X-ray, 34,57 Cs 2 HfCl 6 : 3% Te 4+ crystals exhibit a fascinating X-ray behavior as effective scintillators. The absorption spectra of Cs 2 HfCl 6 : 3% Te 4+ , CsI: Tl, and BGO over a range of X-ray photon energy (0-120 keV) are plotted in Fig.…”

Section: Resultsmentioning

confidence: 99%

High quality lead-free perovskites toward white light emitting diodes and X-ray imaging

et al. 2022

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

High quality lead-free perovskites toward white light emitting diodes and X-ray imaging

et al. 2022

View full text Add to dashboard Cite

show abstract

“…This may be attributed to whether Cr 4+ replaces Si 4+ or Ce 3+ replaces Y 3+ , which are all equivalent substitutions. There is no driving force between Cr Si and Ce Y , so there is a large spatial gap between Ce 3+ and Cr 4+ in a uniform distribution, which is not conducive to direct energy transfer between the two, thereby reducing the excited state lifetime of the luminescent center. However, at the moment of ionizing radiation bombardment such as X-rays, a large number of excited state carriers can be generated in the crystal that can migrate in the conduction and valence bands, − making it possible for carrier competition between Ce 3+ and Cr 4+ with larger spatial spacing.…”

Section: Resultsmentioning

confidence: 99%

Slow Emission Suppression in YSO:Ce Scintillation Crystals by Cr Codoping

Xue,

Wan,

Zhang

et al. 2024

Crystal Growth & Design

Self Cite

View full text Add to dashboard Cite

This work systematically investigated the effect of Cr 4+ codoping on the spectral composition and scintillation performance of YSO:Ce scintillation crystals. A series of YSO:Ce,xCr (x = 0, 0.1, 0.3, 0.6, 1.0, and 2.0 atom %) crystals were grown with the Czochralski method in a nitrogen atmosphere. The influence of Cr 4+ codoping on crystal luminescence was analyzed through transmittance spectra, photoluminescence, and X-ray excited luminescence spectra. Scintillation performance and carrier trap states of the crystals were studied by gamma spectroscopy, scintillation decay dynamics, and thermoluminescence curves. It was found that low concentration Cr 4+ codoping can significantly reduce the proportion of long wavelength emission of the Ce2 site without decreasing the crystal YSO:Ce light output. In the case of high concentration Cr 4+ codoping, light output decreased rapidly due to Cr 4+ forming the intense carrier competition and reabsorption of Ce 3+ emission. However, the decay time could be optimized by about 10% without significantly deteriorating the light output using high concentration Cr 4+ codoped YSO:Ce crystals as an external filter. This could be more valuable for application. In addition, the possible mechanisms of the above phenomena were discussed based on the experimental results.

show abstract

Persistent Luminescence for Night‐Time Individual Identification Based on Quantum Tunneling

Wen,

Liu,

Zhang

et al. 2024

Advanced Optical Materials

View full text Add to dashboard Cite

Night‐time individual identification requires recognizing a specific object from a bunch of homogeneous entities through night‐vision devices. It will facilitate more effective coordinated actions in night‐time disaster rescue or enforcement actions. In this work, the near infrared (NIR) persistent luminescent materials are proposed as the technology solution, which can emit the non‐visible photons continuously for hours without the external excitation. In a magnetoplumbite‐type structure, Cr3+ ions are incorporated to realize NIR emissions. By co‐doping lanthanide ions and constitutional modulation, the afterglow signal can be clearly traced under the night‐vision device over 144 h. A series of spectral measurements are utilized to reveal the mechanism behind this prolonged afterglow duration, and quantum tunneling accounts for the carrier pumping from the deep traps. It avoids the quick exhaust of carriers stored in the shallow traps, and extends the afterglow duration. In a proof‐of‐concept demonstration, the synthesized powders are used to make a quick response pattern, which can be clearly visualized in a dark room by the night‐vision devices. This work is expected to promote the research and development of persistent luminescent materials within NIR region, and to accelerate the applications in night‐time monitoring and recognition.

show abstract

Effects of two strategies on afterglow behavior of Lu2O3:Eu single crystal scintillator: Co-doping with Pr3+ and solid solution with Sc2O3

Cited by 8 publications

References 31 publications

High quality lead-free perovskites toward white light emitting diodes and X-ray imaging

High quality lead-free perovskites toward white light emitting diodes and X-ray imaging

Slow Emission Suppression in YSO:Ce Scintillation Crystals by Cr Codoping

Persistent Luminescence for Night‐Time Individual Identification Based on Quantum Tunneling

Contact Info

Product

Resources

About