Long lasting phosphorescence of Eu2+ in reduced SrO–B2O3 glasses

Zhang, Lan; Li, Chengyu; Wang, Shubin; Su, Qiang

doi:10.1016/j.jlumin.2006.10.011

Cited by 8 publications

(5 citation statements)

References 8 publications

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“…This phenomenon is very interesting, because it is seldom reported that the spectrum of the afterglow and PL of same luminescent ion e.g. Eu 2 + and Tb 3 + in the same material exhibits such a big difference [4][5][6]. Sr 4 Al 14 O 25 and its structure were firstly reported by Nadzhina et al [7].…”

Section: Introductionmentioning

confidence: 85%

Green photoluminescence, but blue afterglow of Tb3+ activated Sr4Al14O25

Zhang

Pang

et al. 2010

Journal of Luminescence

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Section: Introductionmentioning

confidence: 85%

Green photoluminescence, but blue afterglow of Tb3+ activated Sr4Al14O25

Zhang

Pang

et al. 2010

Journal of Luminescence

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“…In the same year, Yamazaki et al found the persistent luminescence of Tb 3+ : 5 D 4 - 7 F J in 60ZnO-20B 2 O 3 -20SiO 2 glass . After that, some persistent glass phosphors doped with Eu 2+ , , Tb 3+ , or Mn 2+ have been found. In these glass persistent phosphors, it is suggested that oxygen vacancies act as electron traps. ,, Also, lanthanide-ion-free and transition metal ion free glass persistent phosphors were reported in the Ge-doped SiO 2 glass and GeO 2 glass in which the Ge-related and oxygen-related defects have an important role for the persistent luminescence.…”

Section: Introductionmentioning

confidence: 95%

“…10 In the same year, Yamazaki et al found the persistent luminescence of Tb 3+ : 5 D 4 -7 F J in 60ZnO-20B 2 O 3 -20SiO 2 glass. 11 After that, some persistent glass phosphors doped with Eu 2+ , 12,13 Tb 3+ , 14 or Mn 2+15 have been found. In these glass persistent phosphors, it is suggested that oxygen vacancies act as electron traps.…”

Section: ■ Introductionmentioning

confidence: 98%

Orange Persistent Luminescence and Photodarkening Related to Paramagnetic Defects of Nondoped CaO-Ga₂O₃-GeO₂ Glass

2019

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Orange persistent luminescence and photodarkening phenomena were observed after ultraviolet (UV) excitation in calcium-gallium-germanate (CGG) glass with a composition of 3CaO-1Ga2O3-3GeO2 prepared by a melt-quenching method. The CGG glass was characterized by using X-ray diffraction, differential scanning calorimetry, and Raman scattering analyses. Also, the optical and electronic properties of the CGG glass were investigated. Based on the electron paramagnetic resonance (EPR) spectra, it is found that new defects, NBOHC (nonbridging oxygen hole center) and E’(Ge) (unpaired electron at Ge ion bonding three oxygen), were created after UV excitation. From the good agreement between the time dependence of the photodarkening absorption intensity and EPR intensity of the NBOHC, the origin of the photodarkening phenomenon is found to be caused by NBOHC. Also, from the relationship between the time dependence of persistent luminescence intensity and the time-derivative EPR intensities of NBOHC and E’(Ge) centers, the persistent luminescence is found to be caused by the recombination process between these two different defects.

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“…Considering the g-value of the lightenhanced EPR signal that is smaller than the g-value of a free electron (g freeÀion = 2.0023), this signal is readily assigned to the presence of trapped electrons. 16,45,46 …”

Section: +mentioning

confidence: 99%

Lu₂CaMg₂(Si_1−xGe_x)₃O₁₂:Ce³⁺solid-solution phosphors: bandgap engineering for blue-light activated afterglow applicable to AC-LED

et al. 2016

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Persistent luminescence (PersL) has long commanded the curiosity of researchers owing to the complicated and profound physics behind it. In this work, the PersL mechanism in a new kind of persistent garnet phosphors, Lu 2 CaMg 2 (Si 1Àx Ge x ) 3 O 12 :Ce 3+ , is studied from the new perspective of a ''solid-solution'' scheme. Different from the conventional study in pursuit of long PersL, we focus on manipulation of afterglow to the millisecond range and tentatively demonstrate its potential to compensate the flickering of the alternating current driven LED (AC-LED) in every AC cycle. Evidently, the tailored host bandgap favors efficient electron charging and facilitates electron detrapping, as well as redeploying trap distribution, which results in a blue light activated afterglow in the millisecond time range, and subsequently a reduced percent flicker of 64.1% for the AC-LED. This investigation is the first attempt to establish the design guidelines for new PersL materials with an adjustable millisecond ranged afterglow, and, hopefully, it paves a pathway to the development of burgeoning low-flickering AC-LED technology.

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Long lasting phosphorescence of Eu2+ in reduced SrO–B2O3 glasses

Cited by 8 publications

References 8 publications

Green photoluminescence, but blue afterglow of Tb3+ activated Sr4Al14O25

Green photoluminescence, but blue afterglow of Tb3+ activated Sr4Al14O25

Orange Persistent Luminescence and Photodarkening Related to Paramagnetic Defects of Nondoped CaO-Ga₂O₃-GeO₂ Glass

Lu₂CaMg₂(Si_1−xGe_x)₃O₁₂:Ce³⁺solid-solution phosphors: bandgap engineering for blue-light activated afterglow applicable to AC-LED

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Long lasting phosphorescence of Eu2+ in reduced SrO–B2O3 glasses

Cited by 8 publications

References 8 publications

Green photoluminescence, but blue afterglow of Tb3+ activated Sr4Al14O25

Green photoluminescence, but blue afterglow of Tb3+ activated Sr4Al14O25

Orange Persistent Luminescence and Photodarkening Related to Paramagnetic Defects of Nondoped CaO-Ga2O3-GeO2 Glass

Lu2CaMg2(Si1−xGex)3O12:Ce3+solid-solution phosphors: bandgap engineering for blue-light activated afterglow applicable to AC-LED

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Orange Persistent Luminescence and Photodarkening Related to Paramagnetic Defects of Nondoped CaO-Ga₂O₃-GeO₂ Glass

Lu₂CaMg₂(Si_1−xGe_x)₃O₁₂:Ce³⁺solid-solution phosphors: bandgap engineering for blue-light activated afterglow applicable to AC-LED