Structural defects and luminescence properties of Sm2+ ions doped in BaBPO5 phosphor by X-ray irradiation

Huang, Yanlin; Zhao, Wenqing; Shi, Liang; Seo, Hyo Jin

doi:10.1016/j.jallcom.2008.11.016

Cited by 29 publications

(17 citation statements)

References 30 publications

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“…Ionizing radiation is capable of liberating electrons from atoms or molecules and breaking chemical bonds, thereby ionizing them. Utilizing ionizing radiation with appropriate doses, the luminescence of phosphors can be modified due to the radiation‐induced defects or radiation‐induced tuning of dopant valence states, or radiation‐induced matrix phase evolution . In general, the most common forms of ionizing radiation include α‐, β‐, γ‐, and X‐rays …”

Section: Strategies Beyond a Chemical Methodsmentioning

confidence: 99%

Tuning the Luminescence of Phosphors: Beyond Conventional Chemical Method

Bai

Tsang

Hao

2014

Advanced Optical Materials

135

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thermoluminescence (TL), and so on. [ 2 ] Nowadays, a large number of phosphors have been synthesized and developed, each one having its own characteristic emission wavelength, bandwidth, and luminescence lifetime. Here, the lifetime normally means the time in which the emission intensity decays to 1/ e . Moreover, phosphors have been extensively utilized in many areas, both scientifi c research and practical applications. For instance, phosphor-converted fl uorescent lamps and white light-emitting devices (LEDs) have been used as light sources in a widespread range of daily life and industrial applications. [ 3 ] CL and EL phosphors have been applied to traditional or modern display devices presenting visual information. [ 4 ] In the past few decades, fl uorescent nanoparticles, such as quantum dots (QDs) [ 5 ] and lanthanide (Ln) ion-doped nanocrystals, [ 6 ] have attracted considerable attention and showed great promise in fl uorescent probes, biosensing, bioimaging, therapies, and optoelectronic devices. [ 7 ] The ability to tune the luminescence properties of phosphors is highly desired in the optical materials community. [ 8 ] For various applications such as solid-state lasers, bioimaging, optical sensing, and display devices, precise control over the luminescence properties is essential for optimizing the performance and processing of optical devices and systems. Tuning luminescence is also of great signifi cance for fundamental studies of the luminescence mechanisms of phosphors. In general, tuning luminescence in the visible region is popularly known as varying the emission colour and brightness obtained by the naked eye. Broadly speaking, tuning luminescence changes the emission intensity, wavelength, bandwidth, luminescence decay or lifetime, and polarization.Numerous studies have extensively focused on tuning the luminescence of phosphors by conventional chemical ways, typically changing chemical compositions, crystal structure, phase, nanocrystal size, surface groups, and so on. [ 9 ] Comparatively, there have been less results that show the tunable luminescence of phosphors through physical methods. So far, few attempts have been made to provide a comprehensive coverage of the strategies pertaining to this emerging research fi eld and a broad overview of research advances in diverse areas of application. In this review, chemically driven luminescence tuning is Tuning the luminescence of phosphors is extremely important in controlling and processing light for active components of light sources, optical sensing, display devices, and biomedicine. So far, conventional chemical approaches have routinely been employed to modify the luminescence during the phosphor's synthesis. It is interesting to broaden the modulation of luminescence by physical methods, such as electric fi eld, magnetic fi eld, mechanical stress, temperature, photons, ionizing radiation, and so on. Since some physical methods may provide unusual routes to tune the luminescence in in-situ, real-time, dynamical and reversible mann...

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Section: Strategies Beyond a Chemical Methodsmentioning

confidence: 99%

Tuning the Luminescence of Phosphors: Beyond Conventional Chemical Method

Bai

Tsang

Hao

2014

Advanced Optical Materials

135

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“…The Sm 2+ ‐doped inorganic materials can show relatively high thermal stability 3 . The luminescence, reduction mechanism, and spectral hole burning of Sm 2+ ions have been investigated in many kinds of materials, such as alkaline‐earth fluorohalides, 4,5 borate glasses, 6,7 fluoride glasses, 8 borophosphate glasses, 9 Al 2 O 3 –SiO 2 glasses, 10,11 ZnS nanocrystals, 12 and phosphates 13,14 …”

Section: Introductionmentioning

confidence: 99%

“…3 The luminescence, reduction mechanism, and spectral hole burning of Sm 21 ions have been investigated in many kinds of materials, such as alkaline-earth fluorohalides, 4,5 borate glasses, 6,7 fluoride glasses, 8 borophosphate glasses, 9 Al 2 O 3 -SiO 2 glasses, 10,11 ZnS nanocrystals, 12 and phosphates. 13,14 Rare-earth Sm ions are known to be stable in trivalent as well as divalent state. Characteristic transitions of Sm 31 (4f 5 ) and Sm 21 (4f 6 ) ions can be found in the distinct spectrum region, so they can be clearly discriminated.…”

Section: Introductionmentioning

confidence: 99%

The Reduction and Luminescence Characteristics of Sm2+ Doped in Ba3BP3O12 Crystal

Wang¹,

Huang²,

Li³

et al. 2011

Journal of the American Ceramic Society

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Sm2+ ions doped in Ba3BP3O12 polycrystalline samples were obtained by heating the materials in a reducing atmosphere and X‐ray irradiation reduction method. The phase formations of the samples were investigated by X‐ray powder diffraction measurements. The temperature‐dependent emission spectra and luminescence decay curves of Sm2+ ions reduced by the two methods were investigated at various temperatures (10–300 K). The crystallographic site distributions and the thermal quenching of 5D0→7F0 luminescence transition of Sm2+ ions in the two samples have different characteristics. The photostabilities of the Sm2+ ions were evaluated with the photobleaching method by monitoring the 5D0→7F0 luminescence transition under the excitation of 488 nm of Ar+ laser. The luminescence and reduction mechanism of Sm3+→Sm2+ were discussed. The luminescence properties and stabilities of the Sm2+ ions are highly dependent on the sample preparation conditions.

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“…The photoluminescence properties of rare earth ions in borates have been studied extensively due to their application in the fields of fluorescent lamps, display devices, and detector systems [1][2][3][4]. Recently, the borate phosphors have attracted great attention due to their potential application in white lighting emitting diodes (white LEDs) and related fields [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%