Structural and optical properties of SrAl2O4: Eu2+/Dy3+ phosphors synthesized by flame spray pyrolysis technique

Gültekin, Serdar; Yıldırım, Serdar; Yılmaz, Ozan; Keski̇n, İlker Çetin; Katı, Mehmet İsmail; Çelik, Erdal

doi:10.1016/j.jlumin.2018.10.011

Cited by 69 publications

(16 citation statements)

References 52 publications

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“…They concluded that the theoretical transition of the conformational environment between [BO 3 ] and [BO 4 ] could enable the reduction of Eu 3+ to Eu 2+ . [ 108 ]…”

Section: Synthesis Methodsmentioning

confidence: 99%

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Smart Mechanoluminescent Phosphors: A Review of Strontium‐Aluminate‐Based Materials, Properties, and Their Advanced Application Technologies

et al. 2022

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Mechanoluminescence, a smart luminescence phenomenon in which light energy is directly produced by a mechanical force, has recently received significant attention because of its important applications in fields such as visible strain sensing and structural health monitoring. Up to present, hundreds of inorganic and organic mechanoluminescent smart materials have been discovered and studied. Among them, strontium‐aluminate‐based materials are an important class of inorganic mechanoluminescent materials for fundamental research and practical applications attributed to their extremely low force/pressure threshold of mechanoluminescence, efficient photoluminescence, persistent afterglow, and a relatively low synthesis cost. This paper presents a systematic and comprehensive review of strontium‐aluminate‐based luminescent materials’ mechanoluminescence phenomena, mechanisms, material synthesis techniques, and related applications. Besides of summarizing the early and the latest research on this material system, an outlook is provided on its environmental, energy issue and future applications in smart wearable devices, advanced energy‐saving lighting and displays.

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“…They concluded that the theoretical transition of the conformational environment between [BO 3 ] and [BO 4 ] could enable the reduction of Eu 3+ to Eu 2+ . [ 108 ]…”

Section: Synthesis Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Smart Mechanoluminescent Phosphors: A Review of Strontium‐Aluminate‐Based Materials, Properties, and Their Advanced Application Technologies

et al. 2022

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“…This implies that the luminescence center in these compounds does not change upon the incorporation of Dy 3+ , and it remains centered at Eu 2+ . Although the Dy 3+ profiles are often observed only in the radioluminescence spectrum, they are likely to be hidden because of their weak intensities under the bright emission profiles of Eu 2+ in most cases [41,69]. Other lanthanide ions such as Nd 3+ and Tm 3+ have also been employed as coactivators and were noted to exhibit similarly strong emission bands from the Eu 2+ luminescence center without their characteristic photoluminescence [44,70].…”

Section: Codoping Of Strontium Aluminate Phosphors With Various Trivalent Lanthanide Ionsmentioning

confidence: 99%

Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

Kim

2021

Nanomaterials

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Lanthanide-activated alkaline earth aluminate phosphors are excellent luminescent materials that are designed to overcome the limitations of conventional sulfide-based phosphors. The increasing research attention on these phosphors over the past decade has led to a drastic improvement in their phosphorescence efficiencies and resulted in a wide variety of phosphorescence colors, which can facilitate applications in various areas. This review article discusses the development of lanthanide-activated alkaline earth aluminate phosphors with a focus on the various synthesis methods, persistent luminescence mechanisms, activator and coactivator effects, and the effects of compositions. Particular attention has been devoted to alkaline earth aluminate phosphors that are extensively used, such as strontium-, calcium-, and barium-based aluminates. The role of lanthanide ions as activators and coactivators in phosphorescence emissions was also emphasized. Finally, we address recent techniques involving nanomaterial engineering that have also produced lanthanide-activated alkaline earth aluminate phosphors with long-persistent luminescence.

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“…These electronic properties are derived from the shape, size, crystal types, and compositions that rely on synthesis methods [9]. Many methods are used in the synthesis of inorganic substances, such as solid-state reactions, precursor polymeric, electrochemical cells [10], galvanic cells [11], molten salts [12], microwave, Pechini [13], Czockhralski [14], co-precipitation [15], flame spray [16] and sol-gel [2]. The sol-gel method is of much interest due to its advantages, such as easy stoichiometric control, good homogeneity, and low calcination temperature.…”

Section: Introductionmentioning

confidence: 99%

Sol-Jel Tekniği ile Sentezlenmiş Sr0,5Ca0,5WO4 Fosforunda Eu3+ İyonunun Lüminesans, TL Kinetik Parametreler ve Elektrokimyasal Davranışındaki Rolü

Katı

Keski̇n

Türemiş

et al. 2021

El-Cezeri Fen Ve Mühendislik Dergisi

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The Eu 3+ doped Sr 0,5 Ca 0,5 WO 4 has been synthesized by the sol-gel method for the first time. The phosphors were analyzed by XRD, SEM, DTA/TG optical absorption spectra, radioluminescence (RL), photoluminescence (PL), and thermoluminescence (TL) spectra. The energy transfer mechanism was determined on Eu 3+ doped Sr 0,5 Ca 0,5 WO 4 phosphor. The XRD results reveal that the samples exhibit a tetragonal scheelite structure. FT-IR spectra provide the proof of scheelite structure with W-O anti-symmetric stretching vibration in [WO 4 ] 2tetrahedrons at 750-910 cm -1 . The Sr 0,5 Ca 0,5 WO 4 phosphor showed a broad emission between 350-750 nm with a maximum of 506 nm. Sr 0,5 Ca 0,5 WO 4 :0.5Eu 3+ phosphor exhibit characteristic emissions of Eu +3 (545, 592, 614, 650, and 700 nm) in the RL spectrum. The host material has excellent energy transfer efficiency for lanthanide ions. The kinetic parameters were calculated by the computerized glow curve deconvolution (CGCD) analysis method. As a result of CGCD, three peaks (E trap :0.74-1.46 eV) for un-doped Sr 0,5 Ca 0,5 WO 4 and five peaks (E trap :0.75-1.28 eV) for Sr 0,5 Ca 0,5 WO 4 : Eu 3+ were determined under main TL glow curve. In the cyclic voltammogram of the doped sample, an oxidation peak of about -0.4 eV, which is thought to be derived from Eu 3+ , was observed. Based on the results, the Sr 0,5 Ca 0,5 WO 4 :Eu +3 phosphors may be potential applicants for LEDs.

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Structural and optical properties of SrAl2O4: Eu2+/Dy3+ phosphors synthesized by flame spray pyrolysis technique

Cited by 69 publications

References 52 publications

Smart Mechanoluminescent Phosphors: A Review of Strontium‐Aluminate‐Based Materials, Properties, and Their Advanced Application Technologies

Smart Mechanoluminescent Phosphors: A Review of Strontium‐Aluminate‐Based Materials, Properties, and Their Advanced Application Technologies

Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

Sol-Jel Tekniği ile Sentezlenmiş Sr0,5Ca0,5WO4 Fosforunda Eu3+ İyonunun Lüminesans, TL Kinetik Parametreler ve Elektrokimyasal Davranışındaki Rolü

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