Long persistent and photostimulated luminescence properties of Sr2Al2SiO7:Eu2+/Tm3+ phosphors

Qi, Ye; Zhang, Jinsu; Yu, Hongquan; Sun, Jiashi; Li, Xiangping; Cheng, Lihong; Chen, Baojiu

doi:10.1016/s1002-0721(14)60569-x

Cited by 17 publications

(2 citation statements)

References 31 publications

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“…Figure 4(b) depicts the excitation spectra of phosphors detected at 585 nm, which emerges as a broad band in the range of 220-500 nm with two main consecutive bands at 350 nm and 410 nm respectively. The excitation spectra show SSET samples have stronger light absorption ability than pure SSE sample, which meaning that moderate doping of Tm 3+ in SSE shows a positive trend of optical sensitization in silicate host [13,18,19]. Besides, the results of the excite spectra identified these samples can match with the near ultra-violet or blue chip perfectly and obtain white light diodes.…”

Section: Resultsmentioning

confidence: 82%

Enhancement of luminescence and thermal stability in Sr_2.92-xTm_xSiO₅:Eu²⁺ for white LEDs

et al. 2020

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Sr2.92-xTmxSiO5:Eu2+ (x = 0–0.09) orange emitting phosphors for white LED were prepared by solid-state method. The crystal structure and morphology of Sr2.92-xTmxSiO5 were determined by XRD and SEM. The phosphor showed strong absorption spectra and can be excited by near-ultraviolet (NUV) light in the range of 200−550 nm which matched well with the NUV light-emitting diode (LED) chips. The emission spectra showed asymmetric band around 585 nm under NUV and assigned to the 4f65d-4f7 transition of Eu2+ occupied Sr2+ sites in the host lattice. It is observed that 5d electron state of Eu2+ which easily influenced by the crystal field was not changed after Tm3+ co-doping in the host. Enhanced emission intensity, improved thermostability and fluorencence decay time have been made via crystal chemical unequivalence substitution of Tm3+ in Sr2+ site. The energy transfer took place between the Tm3+ and Eu2+ activator, the underlying mechanisms of enhanced luminescence and decay fluorescence properties by energy transfer were analyzed.

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Section: Resultsmentioning

confidence: 82%

Enhancement of luminescence and thermal stability in Sr_2.92-xTm_xSiO₅:Eu²⁺ for white LEDs

et al. 2020

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“…As shown in Fig. 3(g), the bright blue PeL can be clearly observed by the naked eye after 24 h. It has been reported that the SrAl 2 Si 2 O 8 and Sr 2 Al 2 SiO 7 matrixes are both suitable for the incorporation of Eu 2+ ions followed by the strong and long PeL [32,33]. As shown in Fig.…”

Section: Luminescence Properties Of the Eu 2+ -Doped Gcmentioning

confidence: 72%

Sunlight activated ultra-stable long persistent luminescence glass ceramic for outdoor information display

Zhao

Lei

et al. 2022

J Adv Ceram

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Natural sunlight activated persistent luminescence (PeL) is ideal candidate for optical information display in outdoors without the requirement of electric supply. Except the brightness and duration, the stability especially water resistance of the PeL materials is of significant importance for practical application, which remains a great obstacle up to date. Herein, we report a new sunlight activated PeL glass ceramic containing hexagonal Sr13Al22Si10O66:Eu2+ crystals, which exhibits strong blue PeL and can last more than 200 h. The PeL can be charged by the full wavelengths located in AM 1.5G due to the broad distribution of traps in the crystal structure. The PeL is clearly observed by the naked eye even after 24 h upon sunlight irradiation irrespective of the weather, and the photoluminescence intensity only decreased ∼3.3% after storing in water for 365 d. We demonstrate its potential application for thermal and stress responsive display as well as long-term continuous security indication upon sunlight irradiation, which not only save vast energy and reduce environment pollution, but also are appropriate for outdoor usage.

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Optically Stimulated Luminescence Phosphors: Principles, Applications, and Prospects

Yuan

Jin

et al. 2020

Laser & Photonics Reviews

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Optically stimulated luminescence (OSL) materials, enabling energy storage by capturing of charge carriers and then the energy conversion to light via photostimulation, can find many advanced applications in various fields, spanning from radiation dosimetry, optical data storage and security, environmental monitoring, biomedicine, clinical diagnostic, to archaeology and geology. At present, there are some blocks, including the development of nanocrystallization approaches, the tailoring of optical transitions, the control of trap distribution, and the understanding of OSL mechanisms, on the road to the exploration of OSL materials. This review gives an overview of the design, preparation, characterization, optimization, application, mechanism, and prospect of OSL materials. A short introduction of the fundamental principle and history of OSL materials is presented, followed by a summary of preparation and design methods, and a survey of OSL materials reported to date. The trap engineering, mechanism, and study methodologies of OSL are summarized, after which the widespread applications of OSL materials, in traditional and newly emerging fields, are reviewed. Finally, the merits and drawbacks of the OSL materials according to the relevant reports currently available are examined. The challenges and outlooks are highlighted and discussed in terms of five important aspects that merit future research.

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Long persistent and photostimulated luminescence properties of Sr2Al2SiO7:Eu2+/Tm3+ phosphors

Cited by 17 publications

References 31 publications

Enhancement of luminescence and thermal stability in Sr_2.92-xTm_xSiO₅:Eu²⁺ for white LEDs

Enhancement of luminescence and thermal stability in Sr_2.92-xTm_xSiO₅:Eu²⁺ for white LEDs

Sunlight activated ultra-stable long persistent luminescence glass ceramic for outdoor information display

Optically Stimulated Luminescence Phosphors: Principles, Applications, and Prospects

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Long persistent and photostimulated luminescence properties of Sr2Al2SiO7:Eu2+/Tm3+ phosphors

Cited by 17 publications

References 31 publications

Enhancement of luminescence and thermal stability in Sr2.92-xTmxSiO5:Eu2+ for white LEDs

Enhancement of luminescence and thermal stability in Sr2.92-xTmxSiO5:Eu2+ for white LEDs

Sunlight activated ultra-stable long persistent luminescence glass ceramic for outdoor information display

Optically Stimulated Luminescence Phosphors: Principles, Applications, and Prospects

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Product

Resources

About

Enhancement of luminescence and thermal stability in Sr_2.92-xTm_xSiO₅:Eu²⁺ for white LEDs

Enhancement of luminescence and thermal stability in Sr_2.92-xTm_xSiO₅:Eu²⁺ for white LEDs