Synthesis and Photoluminescence Properties of the Novel Red Phosphor Gd2MoB2O9: Eu

A novel phosphor, Gd2MoB2O9:Eu3+ has been synthesized by solid-state reaction and its photoluminescence in UV-VUV range are investigated. A sharp excitation band is observed in the region of 120–135 nm, which is related to the charge-transfer (CT) band of Gd3+. The broad band around 135–160 nm can be assigned to the BO3 host absorption. The broad bands around 248 nm are assigned to the CT band of Eu3+-O2-. The phosphors emit strong red luminescence centered at about 591 nm, 614 nm and 626 nm due to the5D0–7F1 and 5D0–7F2 transitions of Eu3+. The main emission peak under 254 and 147 nm excitations also shows different shifts with increasing Eu3+ concentration. This could be due to the different luminescence sites selected at high doping concentrations of Eu3+. Gd2MoB2O9:Eu3+ shows the pure red emission under both 254 and 147 nm excitations.

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Fabrication and Properties of Zinc Silicate Phosphors through Solid State Reaction

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.160-162.594 ◽

2010 ◽

Vol 160-162 ◽

pp. 594-598

Author(s):

Guo Jian Jiang ◽

Jia Yue Xu ◽

Hui Shen ◽

Yan Zhang ◽

Lin He Xu ◽

...

Keyword(s):

Solid State ◽

Solid State Reaction ◽

Solid State Reaction Method ◽

Emission Peak ◽

Zinc Silicate ◽

Red Phosphor ◽

Reaction Method ◽

Long Afterglow ◽

Luminescent Mechanism ◽

Silicate Phosphors

Zinc silicate-based (Zn2SiO4:Eu3+) long afterglow phosphors were produced by solid state reaction method. The effects of borax and Eu2O3 additive on the properties of fabricated products have been studied. The results show that, there is not much difference in phase compositions within the borax additive amount; however, their SEM morphologies are different. Borax additive can increase the grain size of the product. Some sintering phenomena could be observed in the sample with Eu2O3 addition. The fluorescence spectroscopy results indicate that, the emission peak of the sample with Eu3+ additive located at 612nm, which may be a good candidate for red phosphor applications. The luminescent mechanism of Zn2SiO4:Eu3+ is also discussed.

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A red emitting of manganese-doped boron carbon oxynitride (BCNO) phosphor materials: facile approach and photoluminescence properties

RSC Advances ◽

10.1039/c6ra27018b ◽

2017 ◽

Vol 7 (7) ◽

pp. 4161-4166 ◽

Cited By ~ 11

Author(s):

Bebeh W. Nuryadin ◽

Fitri A. Permatasari ◽

Ade Y. Nuryantini ◽

Irfana D. Faryuni ◽

Mikrajuddin Abdullah ◽

...

Keyword(s):

Solid State ◽

Photoluminescence Properties ◽

Solid State Method ◽

Red Emission ◽

State Method ◽

Boron Carbon

A bright red emission of manganese-doped BCNO (BCNO:Mn) phosphor was firstly synthesized by solid state method.

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Enhanced Photoluminescence of YInGe2O7:Eu3+,Li+ Phosphor Prepared Using the Solid-State Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.684.274 ◽

2013 ◽

Vol 684 ◽

pp. 274-278

Author(s):

Huang Yu Chen ◽

Ru Yuan Yang ◽

Shoou Jinn Chang

Keyword(s):

Solid State ◽

Red Light ◽

Broad Band ◽

Lithium Carbonate ◽

Ion Concentration ◽

Photoluminescence Intensity ◽

Photoluminescence Properties ◽

Solid State Method ◽

Enhanced Photoluminescence ◽

Transfer State

A Eu3+ activated YInGe2O7phosphor was synthesized by solid-state reaction and lithium carbonate was added to change the morphology and photoluminescence properties. Scanning electron microscopy showed large particle size and necking shape were obtained as the concentrations of Li+ ions increase. In the PL studies, the excitation spectrum of YInGe2O7:Eu3+ phosphors exhibited a broad band in the UV region centered at about 272 nm attributed to charge transfer state (CTS) band, which has a little shift after Li+ ion was added. As the Li+ ion concentration increased, the photoluminescence intensity of the red emission at 620 nm of Eu3+ ions was enhanced, and the optimized concentration of of added Li+ ion is 0.05. The results showed that addition of Li+ ion allows YInGe2O7:Eu3+ phosphors emitting relatively pure red light.

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VUV-Photoluminescence Properties of (Gd, La)2O2CO3: Eu3+

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1052.203 ◽

2014 ◽

Vol 1052 ◽

pp. 203-206

Author(s):

Zhi Long Wang ◽

Shi Qin Wang ◽

Nin Yao ◽

Xing Min Wei

Keyword(s):

Charge Transfer ◽

Vacuum Ultraviolet ◽

Charge Transfer Band ◽

Broad Band ◽

Photoluminescence Properties ◽

Flux Method ◽

Excitation Spectra ◽

Red Emission ◽

Ultraviolet Excitation

(Gd,La)2-x O2CO3:Eux3+(0.01 ≤x≤0.04) were synthesized via a flux method at 400°C, and their photoluminescence properties under vacuum ultraviolet (VUV) excitation were examined. The excitation spectra showed two bands in the region from 125 nm to 300 nm, the first band centered at 190 nm was ascribed to absorption of related CO32- complex, and the second broad band centered at 246nm and 278nm in Gd2O2CO3:Eu3+ was ascribed to the charge transfer band of O2-→ Eu3+. Series samples exhibited red emission at around 611 nm under vacuum ultraviolet excitation corresponding to the 5D0→ 7F2.transition of Eu3+.

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Novel Mn4+-activated layered oxide-fluoride perovskite-type KNaMoO2F4 red phosphor for wide gamut warm white light-emitting diodes backlight

Dalton Transactions ◽

10.1039/d1dt01863a ◽

2021 ◽

Author(s):

Jiao Wu ◽

Bo Wang ◽

Zhiyuan Liu ◽

Kang Zhang ◽

Xiaoshuang Li ◽

...

Keyword(s):

Solid State ◽

White Light ◽

Light Emitting Diodes ◽

Solid State Lighting ◽

Red Phosphor ◽

Red Emission ◽

Light Emitting ◽

Warm White Light ◽

White Light Emitting Diodes ◽

Perovskite Type

Mn4+-activated oxidefluoride phosphors are attractive for application in wide solid-state lighting devices because of its distinct red emission at about 630 nm and the abundant storage of Mn4+ ion. However,...

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Near UV-Blue Excitable Green-Emitting Nanocrystalline Oxide

Advances in Materials Science and Engineering ◽

10.1155/2011/790517 ◽

2011 ◽

Vol 2011 ◽

pp. 1-7 ◽

Cited By ~ 3

Author(s):

C. E. Rodríguez-García ◽

N. Perea-López ◽

G. A. Hirata

Keyword(s):

Broad Band ◽

Emission Peak ◽

Electronic Transitions ◽

Excitation Band ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

Pl Emission ◽

Intense Broad Band ◽

Nanocrystalline Oxide

Green-emitting Eu-activated powders were produced by a two-stage method consisting of pressure-assisted combustion synthesis and postannealing in ammonia. The as-synthesized powders exhibited a red photoluminescence (PL) peak located at nm when excited with nm UV. This emission peak corresponds to the5D0→7F2transition in Eu3+. After annealing in ammonia, the PL emission changed to an intense broad-band peak centered at nm, most likely produced by 4f65d1→4f7electronic transitions in Eu2+. This green-emitting phosphor has excitation band in the near UV-blue region (–450 nm). X-ray diffraction analysis reveals mainly the orthorhombic EuAlO3and Al2O3phases. Transmission electron microscopy observations showed that the grains are formed by faceted nanocrystals (~4 nm) of polygonal shape. The excellent excitation and emission properties make these powders very promising to be used as phosphors in UV solid-state diodes coupled to activate white-emitting lamps.

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Effect of B2O3 or SiO2 Fluxes on Morphology and Size of Pr-Doped CaTiO3 Phosphor Particles and on their Photoluminescence Properties

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.497.31 ◽

2011 ◽

Vol 497 ◽

pp. 31-37 ◽

Cited By ~ 1

Author(s):

Toru Kyomen ◽

Ryuta Motani ◽

Minoru Hanaya

Keyword(s):

Solid State ◽

Solid State Reaction ◽

Primary Particle ◽

Solid State Reaction Method ◽

Particle Sizes ◽

Photoluminescence Properties ◽

Conventional Solid State Reaction ◽

Red Phosphor ◽

Reaction Method ◽

Primary Particles

Powder of Pr-doped CaTiO3 red phosphor was prepared at 1473 K by a conventional solid-state reaction method with addition of B2O3 or SiO2 as a flux. Primary particle sizes of the prepared samples were increased by using B2O3 flux but decreased by using SiO2 flux. Clear planes, edges, or steps were observed on surfaces of the primary particles. The intensity of photoluminescence induced by irradiation of light with a wavelength longer than ∼350 nm was enhanced about three times by using B2O3 flux. The intensity of photoluminescence induced by irradiation of light with a wavelength shorter than ∼350 nm was enhanced about twice by using either B2O3 or SiO2 fluxes. The origin for the flux effects is discussed.

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The Influence of Dy3+ in the Novel Electron Trapping Materials (ETM) (ETM) SrS: Eu2+, Dy3+

Materials Science Forum ◽

10.4028/www.scientific.net/msf.663-665.429 ◽

2010 ◽

Vol 663-665 ◽

pp. 429-433

Author(s):

Jia Yue Sun ◽

Zhen Xing Liu ◽

Hai Yan Du

Keyword(s):

High Temperature ◽

Solid State ◽

Visible Light ◽

Solid State Reaction ◽

Emission Peak ◽

Electron Trapping ◽

The Novel ◽

Peak Intensity ◽

Broadband Spectrum ◽

Exciting Source

A new electron trapping materials (ETM) SrS: Eu2+, Dy3+, which was prepared by the method of high temperature solid-state reaction. The results indicate that both ultraviolet light and visible light can be used as exciting source to store energy. After exposed under ultraviolet, the sample was stimulated by 980nm laser. As a result, an obvious luminescence at 615 nm was detected. The up-conversion emission spectrum was found to be a continuous broadband spectrum resulted from the multi-transitions of Eu2+ 4f6→4f7 (8S7/2). The emission peak intensity of SrS: Eu2+, Dy3+ was stronger than SrS: Eu2+.

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Photoluminescence properties of sub-micron NaGd 1−x Eu x (WO 4 ) 2 red phosphor for solid state lightings application: Derived by different synthesis routes

Superlattices and Microstructures ◽

10.1016/j.spmi.2016.03.025 ◽

2016 ◽

Vol 93 ◽

pp. 308-321 ◽

Cited By ~ 15

Author(s):

A. Durairajan ◽

J. Suresh Kumar ◽

D. Thangaraju ◽

M.A. Valente ◽

S. Moorthy Babu

Keyword(s):

Solid State ◽

Photoluminescence Properties ◽

Red Phosphor ◽

Synthesis Routes

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Synthesis and photoluminescence properties of MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K) phosphors

Open Physics ◽

10.2478/s11534-012-0014-2 ◽

2012 ◽

Vol 10 (2) ◽

Author(s):

Xipu He ◽

Junli Huang ◽

Liya Zhou ◽

Qi Pang ◽

Fuzhong Gong

Keyword(s):

Luminescence Intensity ◽

Emission Spectra ◽

Concentration Quenching ◽

Excitation Band ◽

Photoluminescence Spectra ◽

Photoluminescence Properties ◽

Red Emission ◽

Reaction Method ◽

Red Phosphors ◽

Pl Intensity

AbstractA series of new red phosphors, MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K), were synthesized using the solidstate reaction method, and their photoluminescence spectra were measured. The MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K) phosphors were efficiently excited by an ultraviolet (UV; 395 nm) source, and showed intense orange-red emission at 595 nm. Further investigation of the concentration-dependent emission spectra indicated that the MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K) phosphors exhibit the strongest luminescence intensity when y = 0.01 in NaZr2(0:95−y)(PO4)3:Eu0.103+, Bi2y 3+ and y = 0.09 in NaZr2(0.95−y)(PO4)3:Eu0.103+, Bi2y 3+, whereas the relative PL intensity decreases with increasing Bi3+ concentration due to concentration quenching. The addition of Bi3+ widens the excitation band of NaZr2(0.95−y)(PO4)3:Eu0.103+, Bi2y 3+ around 320 nm, which provides the useful idea of broadening the excitation band around 300–350 nm to fit the ultraviolet chip.

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