Luminescent properties of a novel reddish-orange phosphor Eu-activated KLaSiO4

AbstractA novel reddish-orange emitting phosphor Eu-activated KLaSiO4 was synthesized by the conventional solid-state reaction at 1200 °C. The luminescence properties of KLaSiO4:Eu phosphor were investigated, and the critical concentration of the activator ion (Eu3+) was established as 0.02 mol per formula unit. Chromaticity coordinates of a typical KLa0.98SiO4:0.02Eu phosphor were x = 0.614 and y = 0.385. The phosphor exhibited reddish-orange luminescence with dominating emission at 612 nm, corresponding to 5D0 → 7F2 of Eu3+. Furthermore, the phosphor was characterized by excellent thermal stability, implying its potential use in white light emitting diodes.

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Preparation and Luminescent Properties of Na5Eu(MoO4)4-x(PO4)x Red Phosphors for White Light-Emitting Diodes Application

Materials Science Forum ◽

10.4028/www.scientific.net/msf.654-656.2025 ◽

2010 ◽

Vol 654-656 ◽

pp. 2025-2028 ◽

Cited By ~ 3

Author(s):

Cui Sheng Xi ◽

Shi Kao Shi ◽

Hui Li Gong ◽

Ji Zhou

Keyword(s):

White Light ◽

Light Emitting Diodes ◽

Luminescent Properties ◽

Solid State Reaction Method ◽

Conventional Solid State Reaction ◽

Red Phosphor ◽

Light Emitting ◽

Red Phosphors ◽

Relative Emission Intensity ◽

White Light Emitting Diodes

(PO4)3- -doped red phosphors, Na5Eu(MoO4)4-x(PO4)x (x ≤ 0.10), were prepared by the conventional solid-state reaction method, and their luminescent properties were studied. Under the excitation of near-UV 395 nm, the phosphors show intense red emission. In particular, the relative emission intensity of Na5Eu(MoO4)3.96(PO4)0.04 sample reaches about 5.0 times in comparison with that of the commercial red phosphor Y2O2S:Eu3+. The phosphor could be suitable for the application of white light-emitting diodes.

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Synthesis and Luminescent Properties of Na5LaxM1-x(WO4)4 (M = Eu, Sm, Bi) Red Phosphors for WLED

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.624.244 ◽

2012 ◽

Vol 624 ◽

pp. 244-247 ◽

Cited By ~ 1

Author(s):

De Cai Huang ◽

You Fu Zhou ◽

Wen Tao Xu ◽

Zhang Fu Yang ◽

Mao Chun Hong ◽

...

Keyword(s):

Rietveld Method ◽

Luminescent Properties ◽

Solid State Reactions ◽

Red Phosphor ◽

Light Emitting ◽

Red Phosphors ◽

Chromaticity Coordinates ◽

Cie Chromaticity ◽

White Light Emitting Diodes ◽

The Impact

A series of Na5La(WO4)4:M3+ (M = Eu, Sm, Bi) phosphors have been synthesized successfully by the solid-state reactions. The corresponding crystal structure and lattice parameters were refined by the Rietveld method, and the impact of doped metal ions upon the structure were also studied. The photoluminescent properties were investigated at room temperature. All the samples were observed a strong red emission under 395nm or 465 nm excitation, and the CIE chromaticity coordinates (x = 0.67, y = 0.33) was found to be close to the National Television Standard Committee (NTSC) standard red, implying high color purity. This kind of tungstate phosphor is a promising candidate as the red phosphor for white light-emitting diodes (WLED).

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The Morphologies and Photoluminescence of Ce3+-Doped 0.5La2O3-2SrO-0.5Al2O3 Phosphors with SrF2

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.680.228 ◽

2016 ◽

Vol 680 ◽

pp. 228-232

Author(s):

Xi Guang Gu ◽

Ren Li Fu ◽

Ye Tang ◽

Fang Yang

Keyword(s):

Solid State ◽

White Light ◽

Solid State Reaction ◽

Emission Intensity ◽

Solid State Reaction Method ◽

Conventional Solid State Reaction ◽

Light Emitting ◽

Reaction Method ◽

Reducing Atmosphere ◽

White Light Emitting Diodes

Ce3+-doped 0.5La2O3-2SrO-0.5Al2O3 (LSA:Ce) phosphors had been successfully synthesized using a conventional solid-state reaction method under reducing atmosphere (H2/N2 =1/5). The phase, morphologies and luminescence properties of the LSA:Ce phosphors were investigated. The emission intensity of LSA:Ce phosphors was improved by the addition of SrF2 as flux, and red shift of PL spectra peak was observed in this phosphors. Research results shown that the LSA:Ce phosphors have the potential to meet the development of white light-emitting diodes.

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