Structure and luminescence properties of a novel yellow super long-lasting phosphate phosphor Ca6BaP4O17:Eu2+,Ho3+

Guo, Haijie; Chen, Wenbo; Zeng, Wei; Li, Gen; Wang, Yuhua; Li, Yanyan; Li, Yang; Ding, Xin

doi:10.1039/c5tc00810g

Cited by 76 publications

(42 citation statements)

References 38 publications

(35 reference statements)

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“…As is displayed in the inset of Figure A, doping of Zn 2+ effectively prolongs the LPL lifetimes. Generally, the lattice defects acting as traps play an essential role in LPL phosphors . Hence, it could be safe to say that more defects are created with the incorporation of Zn 2+ , which has a significant influence on the LPL performance.…”

Section: Resultsmentioning

confidence: 99%

Role of oxygen vacancies in long persistent phosphor Ca₂Ga₂GeO₇: Zn²⁺

et al. 2018

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Acting as the electron trap, oxygen vacancies can strongly influence the long persistent luminescence (LPL) properties were verified in Ca2Ga2GeO7: Zn2+ (CGGZ) phosphor. The existence of oxygen vacancies in this self‐excitation material was confirmed by a simple fluorescence probe method. The introduction of zinc ions promotes the generation of oxygen vacancies, as well as optimizes its LPL properties. Thermoluminescence (TL) analysis revealed that electrons in deep trap will effectively transfer to the shallow one via the bridge of interstitial zinc. Accordingly, a mechanism for PL and LPL in this Gallogermanates was provided.

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Section: Resultsmentioning

confidence: 99%

Role of oxygen vacancies in long persistent phosphor Ca₂Ga₂GeO₇: Zn²⁺

et al. 2018

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“…The major processes include ① the electron excitation via host absorption or Eu 2+ : 4f 7 →4f 6 5d transition, ② the electron photoionization from Eu 2+ excited state to CB bottom, ③ the electron trapping, ④ the electron liberation with the aid of heat or NIR laser, and ⑤ the electron emission. The generated PSL follows a sequence of ①→②→③→④→⑤ As revealed by Figure S10, Supporting Information, there are at least three different kinds of traps (Type 1, 2, and 3) in the host, considering the TL curve could be deconvoluted into three well‐resolved Gaussian peaks. The electrons in Trap 1 with shallow depth are soon depleted after stoppage of the excitation source, corresponding to the rapid decay in the initial stage.…”

Section: Resultsmentioning

confidence: 99%

A Photostimulated BaSi₂O₅:Eu²⁺,Nd³⁺ Phosphor‐in‐Glass for Erasable‐Rewritable Optical Storage Medium

Lin

Huang

et al. 2019

Laser & Photonics Reviews

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Up‐to‐date optical storage technology calls for large memory capacity, expanded storage dimension, rewritable capability, low cost, and high energy efficiency, which poses stringent requirements on the storage medium. In this study, a novel BaSi2O5:Eu2+,Nd3+ photostimulated luminescence (PSL) phosphor is developed and then made into phosphor‐in‐glass (PiG) storage medium. Upon ultraviolet light irradiation (write‐in), the generated electrons are captured by the traps, which can be further released by thermal or near‐infrared laser stimulation (read‐out). An insightful investigation is carried out to establish the relationship between trap properties and PSL performance. Demonstration application confirmed the intensity‐multiplexing optical information (including the designed bar code, quick response (QR) code, graphic patterns, and binary data) encoding/decoding. Remarkably, BaSi2O5:Eu2+,Nd3+ PSL PiG show excellent erasable‐rewritable capability thanking to the admirable anti‐ultraviolet property in glass host, as well as good optical data retention ability owing to the spatially isolated deep traps. Hopefully, the present work can push forward the research progress of PSL material and its practical application in optical storage.

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“…To further investigate the details of these defects, the TL curve of CNL: 0.02 Eu 2+ /Eu 3+ sample is plotted in Figure D, and two temperature bands located at 180 and 380°C can be observed. The depth of the trap can be calculated based on the following formula:

E = T_{normalm} / 500

where T m is the peak position in the TL curve (180 or 380°C), and E represents the energy difference between CBM and the traps, which is the trap depth. The depth of these traps is determined to be 0.906 and 1.316 eV at 180 and 380°C, respectively.…”

Section: Resultsmentioning

confidence: 99%

Ca₂Na₂La₆(SiO₄)₄(PO₄)₂O: Eu²⁺/Eu³⁺: A visual dual‐emitting fluorescent ratiometric temperature sensor

et al. 2019

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A novel apatite‐based UV‐excited dual‐emitting Ca2Na2La6(SiO4)4(PO4)2O: Eu2+/Eu3+ phosphor (CNL: Eu2+/Eu3+) was designed and successfully synthesized by a solid‐state reaction. Compared with previous reports on this family of materials, a structural study based on DFT calculation exhibited a new consequence that the monovalent ions in this system are more inclined to occupy the seven‐coordinate cationic sites rather than the nine‐coordinate sites. This result was confirmed by the structural refinement and high‐resolution transmission electron microscopy (HRTEM) data. Due to the coexistence of Eu2+ and Eu3+ dopants in the material, under 345 or 392 nm excitation, CNL: 0.02Eu2+/Eu3+ exhibited a green Eu2+ emission band (528 nm) and red Eu3+ emission peaks (around 618 nm). The application potential of CNL:0.02Eu2+/Eu3+ in luminescent thermometry was studied by exploiting the temperature sensitivity of the fluorescent intensity ratio (green/red) at different temperatures. It was found that, under 345 nm excitation, the fluorescent intensity ratio of CNL: 0.02Eu2+/Eu3+ displayed linear correlation over the temperature range of 298 to 473 K with a high sensitivity of 2.82%K−1. Additionally, the emission color of the CNL: 0.02Eu2+/Eu3+ sample under UV lamp (254 and 365 nm) excitation showed an obvious change (from green to red) as the temperature increased from 298 to 473 K (from green to red). These results indicated that CNL: Eu2+/Eu3+ can serve as an excellent visual luminescent ratiometric thermometer. Furthermore, this work provides a novel reference for developing high‐performance luminescence temperature‐sensing materials.

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Structure and luminescence properties of a novel yellow super long-lasting phosphate phosphor Ca₆BaP₄O₁₇:Eu²⁺,Ho³⁺

Abstract: The brand new LLP material Ca6BaP4O17:Eu2+,Ho3+ exhibits about 0.13 cd m−2 initial LLP intensity and a 47 h afterglow.

Cited by 76 publications

References 38 publications

Role of oxygen vacancies in long persistent phosphor Ca₂Ga₂GeO₇: Zn²⁺

Role of oxygen vacancies in long persistent phosphor Ca₂Ga₂GeO₇: Zn²⁺

A Photostimulated BaSi₂O₅:Eu²⁺,Nd³⁺ Phosphor‐in‐Glass for Erasable‐Rewritable Optical Storage Medium

Ca₂Na₂La₆(SiO₄)₄(PO₄)₂O: Eu²⁺/Eu³⁺: A visual dual‐emitting fluorescent ratiometric temperature sensor

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Structure and luminescence properties of a novel yellow super long-lasting phosphate phosphor Ca6BaP4O17:Eu2+,Ho3+

Abstract: The brand new LLP material Ca6BaP4O17:Eu2+,Ho3+ exhibits about 0.13 cd m−2 initial LLP intensity and a 47 h afterglow.

Cited by 76 publications

References 38 publications

Role of oxygen vacancies in long persistent phosphor Ca2Ga2GeO7: Zn2+

Role of oxygen vacancies in long persistent phosphor Ca2Ga2GeO7: Zn2+

A Photostimulated BaSi2O5:Eu2+,Nd3+ Phosphor‐in‐Glass for Erasable‐Rewritable Optical Storage Medium

Ca2Na2La6(SiO4)4(PO4)2O: Eu2+/Eu3+: A visual dual‐emitting fluorescent ratiometric temperature sensor

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Structure and luminescence properties of a novel yellow super long-lasting phosphate phosphor Ca₆BaP₄O₁₇:Eu²⁺,Ho³⁺

Role of oxygen vacancies in long persistent phosphor Ca₂Ga₂GeO₇: Zn²⁺

Role of oxygen vacancies in long persistent phosphor Ca₂Ga₂GeO₇: Zn²⁺

A Photostimulated BaSi₂O₅:Eu²⁺,Nd³⁺ Phosphor‐in‐Glass for Erasable‐Rewritable Optical Storage Medium

Ca₂Na₂La₆(SiO₄)₄(PO₄)₂O: Eu²⁺/Eu³⁺: A visual dual‐emitting fluorescent ratiometric temperature sensor