Photoluminescence and afterglow behavior of Tb 3+  activated Li 2 SrSiO 4  phosphor

Li, Xinyu; Liang, Chunxin; Guo, Shaojie; Xiao, Yingjun; Chang, Chengkang

doi:10.1016/j.jlumin.2017.04.036

Cited by 19 publications

(4 citation statements)

References 32 publications

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“…It is ascribed to the fact that T‐CsPbBr 3 : La 3+ NCs possess the fascinating color purity reaches 89.9% (Figure 5d), which is indeed more saturated compared with the commercial LPL phosphors. [ 8–17 ]…”

Section: Resultsmentioning

confidence: 99%

“…Nevertheless, it is pointed out that high color purity of the developed LPL materials is hardly achieved, as the emission usually comes from localized electron transitions that combine with the released carriers assisted by thermal disturbance, producing multi‐peaks for the f‐f transitions [ 12–14 ] or a wide full width at half maximum (FWHM >50 nm) for the f‐d transitions. [ 15–17 ] It severely restricts advanced image recognition and poses major challenges for the accuracy and security of the recorded information for optical storage and anti‐counterfeiting technology. [ 18,19 ]…”

Section: Introductionmentioning

confidence: 99%

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Long Persistent Luminescence from All‐Inorganic Perovskite Nanocrystals

Zhang

Yang

Zhao

et al. 2020

Advanced Optical Materials

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The advantages of ultrahigh https://photoluminescence quantum yield and narrow spectral bandwidth of all‐inorganic lead halide perovskite https://nanocrystals (NCs) enable them as the most potential candidates for optoelectronic applications. However, it is difficult to obtain long persistent luminescence from inorganic perovskite https://nanocrystals as the creation of effective trapping centers comes along with the generation of nonradioactive recombination centers. Here, replacing Pb2+ by appropriate lanthanide ions (Ln3+) in CsPbBr3 https://nanocrystals that are embedded inside an amorphous transparent medium via a high‐temperature (≈500 °C) fabrication process is proposed to achieve stable and effective trapping centers. Furthermore, the surface coating of the enclosed https://nanocrystals prevents the formation of surface defects, leading to long persistent luminescence from CsPbBr3: Ln3+ NCs. The CsPbBr3: Ln3+ NCs with unprecedented high color purity (≈89.9%) and long lasting time of more than 1800 s could be a promising candidate for the application in anti‐counterfeiting.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Long Persistent Luminescence from All‐Inorganic Perovskite Nanocrystals

Zhang

Yang

Zhao

et al. 2020

Advanced Optical Materials

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“…In particular, phosphors that can continue to emit light even after the energy is cut off are called afterglow or persistent phosphors. These afterglow phosphors are used in watch dials or safety signage, and are expected to be useful for lighting or display at night without electricity in the future [1,2]. One of the most famous afterglow phosphors is * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Photostimulated luminescence excited by infrared LEDs in CaS:Eu²⁺ red afterglow phosphors

Yamaguchi¹,

Suda²,

Nanai³

et al. 2022

J. Phys. D: Appl. Phys.

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Red photostimulated luminescence at 650 nm appears under the excitation by using an infrared light-emitting diode at 940 nm in CaS:Eu2+ afterglow phosphors. The effect of doping of Dy3+ ions, alkali metal ions or Cl- ions in CaS:Eu2+ on afterglow or photostimulation is investigated. Afterglow temporal decays and thermoluminescence glow curves suggest that Dy3+ ions and alkali metal ions induce different types of defects in the phosphor, and enhance the afterglow independently. Doping of Cl- ions is found to enhance the photostimulation by the infrared excitation. Even if the phosphor is irradiated with infrared light for some seconds, the afterglow decay curve is the same as when it is not irradiated with infrared light. Trap states responsible for the photostimulation are different from those responsible for the afterglow. The red photostimulation appears under the excitation at 940 nm, after the phosphor is left in the dark for 60 minutes. Its intensity is 68% of the red photostimulated luminescence generated after being left in the dark for 10 minutes. It is considered that the PSL decreases little, when the sample is kept in the dark.

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“…The inorganic LPL phosphor based on rare-earth (RE) element doping was first presented in the 1960s mainly for lamps and cathode-ray tubes. , In the mid-1990s, RE-codoped LPL phosphor, SrAl 2 O 4 :Eu 2+ /Dy 3+ , effectively prolonged the persistent luminous time to 2000 min . Nowadays, the majority of high-performance LPL materials are based on doped inorganic oxides, such as Ca 2 Al 2 SiO 7 :Pr 3+, SrAl 2 O 4 :Eu 2+ /Dy 3+, Li 2 ZnGeO 4 :Mn 2+ , and a series of other inorganic oxides. − The fabrication of these materials requires a complex crystal growth process under harsh conditions (>1000 °C) for 2–5 h to generate efficient electron-trapping states in host lattices. To reduce the reaction temperature, the sol–gel method (>500 °C) , and hot injection for inorganic oxide NCs (∼300 °C) − were both developed.…”

Section: Introductionmentioning

confidence: 99%

Long-Persistent Luminescence from Double Self-Defect States in Undoped Cs3In2Cl9 Nanocrystals for Bioimaging and Display Technologies

Yang

Guo

Tang

et al. 2022

ACS Appl. Nano Mater.

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A long-persistent luminescence (LPL) material based on lead-free perovskite nanocrystals (Cs3In2Cl9 NCs) was synthesized by hot injection at 175 °C. Based on X-ray diffraction and theoretical calculations, the crystal structure of Cs3In2Cl9 NCs belongs to the trigonal space group R3̅c. The Cs3In2Cl9 NC powder emits white light at a peak wavelength of 430 nm with a full width at half maximum (FWHM) of about 118 nm and a photoluminescence quantum yield (PLQY) of 26.3%. The lifetime of its LPL is ∼1 s at 300 K and ∼10 s at 77 K. To explain the mechanism of LPL in Cs3In2Cl9, double self-defect states (DSDS) were proposed. To the best of our knowledge, this is the first time to obtain LPL in undoped lead-free perovskites. It promotes the application of perovskites and the explanation of the mechanism of LPL.

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Photoluminescence and afterglow behavior of Tb 3+ activated Li 2 SrSiO 4 phosphor

Cited by 19 publications

References 32 publications

Long Persistent Luminescence from All‐Inorganic Perovskite Nanocrystals

Long Persistent Luminescence from All‐Inorganic Perovskite Nanocrystals

Photostimulated luminescence excited by infrared LEDs in CaS:Eu²⁺ red afterglow phosphors

Long-Persistent Luminescence from Double Self-Defect States in Undoped Cs3In2Cl9 Nanocrystals for Bioimaging and Display Technologies

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Photoluminescence and afterglow behavior of Tb 3+ activated Li 2 SrSiO 4 phosphor

Cited by 19 publications

References 32 publications

Long Persistent Luminescence from All‐Inorganic Perovskite Nanocrystals

Long Persistent Luminescence from All‐Inorganic Perovskite Nanocrystals

Photostimulated luminescence excited by infrared LEDs in CaS:Eu2+ red afterglow phosphors

Long-Persistent Luminescence from Double Self-Defect States in Undoped Cs3In2Cl9 Nanocrystals for Bioimaging and Display Technologies

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Photostimulated luminescence excited by infrared LEDs in CaS:Eu²⁺ red afterglow phosphors