Violet–blue up conversion photostimulated luminescence properties and first principles calculations of a novel un-doped CaZrO3 phosphor for application in optical storage

Li, Xue; Zhang, Jiachi; Ma, Xinlong; Sheng, Hongfei; Feng, Pengfei; Shi, Lifeng; Hu, Rui; Wang, Yuhua

doi:10.1016/j.jallcom.2012.10.145

Cited by 52 publications

(30 citation statements)

References 27 publications

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“…The spectra consists of a sharp peak at around 246 nm which is attributed to electron transfer from lled 2p shell of oxygen to vacant 4d shell of zirconium. 43 This is generally termed as host absorption band (HAB). Similar kind of transition is observed previously in our SrZrO 3 sample also.…”

Section: Photoluminescence Properties Of Undoped Cazromentioning

confidence: 99%

“…Such visible light emission on UV excitation in sample without any activator ion can be ascribed to presence of defects in the lattice. Liu et al 43 has attributed such broad emission to ½CaO 7 $V cc O =½CaO 7 $V cc O defect cluster but without any experimental basis and concluded solely on work done by Longo and Group. 53,54 It is known that annealing ternary oxides at high temperature leads to creation of oxygen vacancy 55 and more likely broad blue emission in calcium zirconate is induced by oxygen vacancy.…”

Section: 28mentioning

confidence: 99%

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Nature of defects in blue light emitting CaZrO₃: spectroscopic and theoretical study

et al. 2015

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The optical behaviour of a perovskite ceramic CaZrO 3 is investigated. The orthorhombic CaZrO 3 was obtained by gel combustion synthesis which yielded phase pure product at temperatures as low as 600C. Transmission electron microscopy shows the formation of highly monodisperse nanospheres of calcium zirconate. Despite the absence of any activator, undoped CaZrO 3 showed distinct excitation and emission spectra attributed to the presence of local defects in the perovskite phase. Photoluminescence

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Section: Photoluminescence Properties Of Undoped Cazromentioning

confidence: 99%

Section: 28mentioning

confidence: 99%

Nature of defects in blue light emitting CaZrO₃: spectroscopic and theoretical study

et al. 2015

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“…Liu et al. had reported blue emission for CaZrO 3 perovskites which is attributed to the [CaO 7 .V” o ] – [CaO 7 .V’ o ] defect cluster in the perovskites formed due to the high temperature synthesis . Gupta et al had confirmed that this blue emission is due to the oxygen vacancies in CaZrO 3 which act as radiating centers, created due to high temperature annealing.…”

Section: Introductionmentioning

confidence: 98%

“…Along with these properties CaZrO 3 had been reported to have excellent mechanical and chemical properties . The long lasting phosphorescence CaZrO 3 and photo‐stimulated luminescence phenomenon of rare earth doped CaZrO 3 make it an excellent host material in the luminescent studies .…”

Section: Introductionmentioning

confidence: 99%

Tailoring the photoluminescent properties of samarium and dysprosium codoped calcium zirconate perovskites for WLED applications

Venugopal¹,

Kumar²,

Satheesh³

et al. 2019

Int J Applied Ceramic Tech

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This study investigates the photoluminescent properties of Dy3+/Sm3+ single and codoped CaZrO3perovskites that were prepared through conventional solid state ceramic route method. X‐ray diffraction studies confirmed the orthorhombic (Pnma) perovskite structure of the calcined samples. Photoluminescence studies of Dy3+doped CaZrO3 systems showed emission peaks at 484 nm and 575 nm due to the transition between 4F9/2–6H15/2 and 4F9/2–6H13/2 levels respectively. Intense red emissions were observed for Sm3+ doped CaZrO3 systems at around 567 nm, 603 and 646 nm that corresponds to the 4G5/2 → 6H5/2, 4G5/2 → 6H7/2 and 4G5/2 → 6H9/2 transitions of Sm3+. Two different emissions were observed at different excitations for Dy3+/Sm3+ codoped CaZrO3systems. Pleasant white light emission was achieved for the CaZr0.9Sm0.025Dy0.075O3 system at 354 nm excitation with CIE color coordinates (0.3310, 0.3349) with a quantum yield of 16.14%, makes this system a promising candidate for WLED and display device applications. Uniform grain morphology and elemental composition of CaZr0.9Sm0.025Dy0.075O3 sample was revealed from scanning electron microscopic and electron dispersive X‐ray analysis. The presence of elements and their oxidation states in the calcined samples for doubly doped system was confirmed from X‐Ray photoelectron spectroscopicstudies.

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“…On the other hand, long persistent luminescence (LPL), exhibiting emission of light lasting for several minutes or hours after removing the excitation source, have attracted great attentions for their wide application in the fields of security signs, night displays, optical storage media, solar energy and vivo bio‐imaging . It is possible to support the photocatalytic degradation of TiO 2 in dark condition by utilizing the LPL.…”

Section: Introductionmentioning

confidence: 99%

Long Persistent Phosphor CdSiO₃:Gd³⁺,Bi³⁺ and Potential Photocatalytic Application of CdSiO₃:Gd³⁺,Bi³⁺@TiO₂ in Dark

et al. 2016

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To support photocatalytic decomposition of TiO 2 in lowtransparent wastewaters or in the dark, we develop a novel ultraviolet emitting long persistent phosphor CdSiO 3 :Gd 3+ , Bi 3+ , which the persistent luminescence can last for more than 6 h (0.32 mcd/m 2 ). Approximately 68.7% of the spectral areas of the optimal sample can well match the absorption band of TiO 2 . The long persistent luminescent mechanism is discussed in details. The investigations of decomposition of methylene blue by CdSiO 3 :Gd 3+ ,Bi 3+ @TiO 2 composite reveals that the long persistent luminescence of CdSiO 3 :Gd 3+ ,Bi 3+ can not only support the photocatalytic activity of TiO 2 in the dark but also significantly increases the photocatalytic efficiency under ultraviolet irradiation. Thus, the CdSiO 3 :Gd 3+ , Bi 3+ @TiO 2 composite is potentially used as functional photocatalyst to treat the organic pollutants in low-transparent wastewater or in the dark.

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Violet–blue up conversion photostimulated luminescence properties and first principles calculations of a novel un-doped CaZrO3 phosphor for application in optical storage

Cited by 52 publications

References 27 publications

Nature of defects in blue light emitting CaZrO₃: spectroscopic and theoretical study

Nature of defects in blue light emitting CaZrO₃: spectroscopic and theoretical study

Tailoring the photoluminescent properties of samarium and dysprosium codoped calcium zirconate perovskites for WLED applications

Long Persistent Phosphor CdSiO₃:Gd³⁺,Bi³⁺ and Potential Photocatalytic Application of CdSiO₃:Gd³⁺,Bi³⁺@TiO₂ in Dark

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Violet–blue up conversion photostimulated luminescence properties and first principles calculations of a novel un-doped CaZrO3 phosphor for application in optical storage

Cited by 52 publications

References 27 publications

Nature of defects in blue light emitting CaZrO3: spectroscopic and theoretical study

Nature of defects in blue light emitting CaZrO3: spectroscopic and theoretical study

Tailoring the photoluminescent properties of samarium and dysprosium codoped calcium zirconate perovskites for WLED applications

Long Persistent Phosphor CdSiO3:Gd3+,Bi3+ and Potential Photocatalytic Application of CdSiO3:Gd3+,Bi3+@TiO2 in Dark

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Nature of defects in blue light emitting CaZrO₃: spectroscopic and theoretical study

Nature of defects in blue light emitting CaZrO₃: spectroscopic and theoretical study

Long Persistent Phosphor CdSiO₃:Gd³⁺,Bi³⁺ and Potential Photocatalytic Application of CdSiO₃:Gd³⁺,Bi³⁺@TiO₂ in Dark