Emission properties of Eu2+, Mn2+ in MAl2Si2O8 (M=Sr, Ba)

Ye, Shi; Liu, Zhongshi; Wang, Xiu‐Teng; Wang, Jiaguo; Wang, Ling-Xuan; Jing, Xiping

doi:10.1016/j.jlumin.2008.07.015

Cited by 62 publications

(11 citation statements)

References 14 publications

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“…By considering the ionic radius and charge compensation for Mn 2 , it is reasonable to assume that Mn 2 prefers to occupy Zn 2 sites and decrease the cell parameters of the host crystal due to smaller radius of Mn 2 ions, and consequently with increasing dopant concentration, the crystal field strength enhances. It is known that crystal field strength is inversely proportional to the 5th power of the central ion-ligand distance [35]. Therefore, shorter Mn-O distance results in a larger crystal field splitting of Mn 2 3D energy levels and finally leads to a small red shift of the emission wavelength [36].…”

Section: B Sensitizermentioning

confidence: 99%

SrZn_2Si_2O_7:Eu^2+, Mn^2+: a single-phased emission tunable nanophosphor suitable for white light emitting diodes

et al. 2013

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A series of emission-tunable nanophosphors with nominal composition of Sr 0.96 Zn 2−x Si 2 O 7 :0.04Eu 2 , xMn 2 (0 ≤ x ≤ 0.15) were designed and synthesized by solgel technique for application in white-light-emitting diodes. The structural, morphological, and optical properties were investigated using comprehensive characterization methods, such as x-ray diffraction, scanning and transmission electron microscopy, energy-dispersive x-ray spectroscopy, and photoluminescence spectroscopy. The results indicate that the calcination temperature has strong effect on the crystalinity and morphology. Moreover, the calcination temperature can change grain size and microstrain. SrZn 2 Si 2 O 7 :Eu 2 , Mn 2 phosphors show two emission bands excited by near ultraviolet light: blue (around 480 nm) and orange-yellow (around 595 nm) emissions. These emissions are photophysically originated from 4f 6 5d 1 2 D → 4f 7 8 S 7∕2 transition of Eu 2 sensitizer ions and 4 T 1 4 G → 6 A 1 6 S transition of Mn 2 activator ions, respectively. The phosphors can generate various lights with different color coordinates and relative color temperatures by properly tuning the relative ratio of the Eu 2 to Mn 2 ions through the principle of energy transfer. The energy transfer from Eu 2 to Mn 2 in SrZn 2 Si 2 O 7 host matrix was confirmed by several experimental results, such as the luminescence spectra, energy transfer efficiency, and decay curve of the phosphors. Furthermore, the mechanism of this phenomenon was demonstrated as resonant type via a dipole-quadrupole reaction and the critical distance between Eu 2 and Mn 2 ions was calculated at about 10.7 Å. Eventually, when the dopant content of Mn 2 is 0.09, the color coordinate of the phosphor (x 0.345, y 0.301) is close to the normal white light and can be considered as a suitable UV-converting phosphor for white light-emitting diodes.

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Section: B Sensitizermentioning

confidence: 99%

SrZn_2Si_2O_7:Eu^2+, Mn^2+: a single-phased emission tunable nanophosphor suitable for white light emitting diodes

et al. 2013

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“…2(c), a significant overlap between the emission spectrum of Eu 2+ and the enlarged excitation spectrum of Mn 2+ occurs, indicating an existence of the effective resonant energy transfer from Eu 2+ to Mn 2+ . This type of energy transfer is quite common and has been observed in Eu 2+ and Mn 2+ co-doped phosphors, such as SrAl 2 Si 2 O 8 :Eu 2+ ,Mn 2+ [12], Ba 3 MgSi 2 O 8 :Eu 2+ ,Mn 2+ [13], Ca 3 SiO 4 Cl 2 :Eu 2+ ,Mn 2+ [14] and so on.…”

Section: Resultsmentioning

confidence: 82%

Luminescence and energy transfer in Eu2+, Mn2+ co-doped Li4SrCa(SiO4)2 for white light-emitting-diodes

Zhang

Seo

2009

Physics Letters A

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“…The market recent years is expanding rapidly for the lamps which based on the phosphors down‐conversion of the white‐light‐emitting diodes (LEDs) which were potential replacements for conventional light sources such as incandescent and fluorescent lamps . Lighting from the LED‐based phosphors can provide significant power saving, higher luminous efficiency, longer lifetime, reliability, etc .…”

Section: Introductionmentioning

confidence: 99%

A Single‐Phased Sr_1−y‐3x/2Al₂Si₂O₈: xCe³⁺, yMn²⁺ with Efficient Energy Transfer as a Potential Phosphor for White‐Light‐Emitting Diodes

Dai

2014

J. Am. Ceram. Soc.

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A series of Ce3+‐ and Mn2+‐(co‐)activated SrAl2Si2O8 phosphors have been prepared at 1350°C under a reducing atmosphere and their photoluminescence properties have been studied as a function of the (co‐)dopant ions concentrations. We have discovered that energy transfer (ET) not only from Ce3+ to Mn2+ but also from “defects” to Mn2+ by the facts that there is existing significant overlap between the emission spectrum of Ce3+ (“defects”) and the excitation spectrum of Mn2+. The source of the “defects” in the host lattice is originated from the different charge substitution between Ce3+ and Sr2+. By adopting the principle of ET, the material SrAl2Si2O8: Ce, Mn can act as a phosphor for white‐light ultraviolet light‐emitting diodes (UV‐LEDs) by tuning of the dopants contents.

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Emission properties of Eu2+, Mn2+ in MAl2Si2O8 (M=Sr, Ba)

Cited by 62 publications

References 14 publications

SrZn_2Si_2O_7:Eu^2+, Mn^2+: a single-phased emission tunable nanophosphor suitable for white light emitting diodes

SrZn_2Si_2O_7:Eu^2+, Mn^2+: a single-phased emission tunable nanophosphor suitable for white light emitting diodes

Luminescence and energy transfer in Eu2+, Mn2+ co-doped Li4SrCa(SiO4)2 for white light-emitting-diodes

A Single‐Phased Sr_1−y‐3x/2Al₂Si₂O₈: xCe³⁺, yMn²⁺ with Efficient Energy Transfer as a Potential Phosphor for White‐Light‐Emitting Diodes

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Emission properties of Eu2+, Mn2+ in MAl2Si2O8 (M=Sr, Ba)

Cited by 62 publications

References 14 publications

SrZn_2Si_2O_7:Eu^2+, Mn^2+: a single-phased emission tunable nanophosphor suitable for white light emitting diodes

SrZn_2Si_2O_7:Eu^2+, Mn^2+: a single-phased emission tunable nanophosphor suitable for white light emitting diodes

Luminescence and energy transfer in Eu2+, Mn2+ co-doped Li4SrCa(SiO4)2 for white light-emitting-diodes

A Single‐Phased Sr1−y‐3x/2Al2Si2O8: xCe3+, yMn2+ with Efficient Energy Transfer as a Potential Phosphor for White‐Light‐Emitting Diodes

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A Single‐Phased Sr_1−y‐3x/2Al₂Si₂O₈: xCe³⁺, yMn²⁺ with Efficient Energy Transfer as a Potential Phosphor for White‐Light‐Emitting Diodes