Enhanced luminescence in CaMoO4: Eu3+ red phosphor nanoparticles prepared by mechanochemically assisted solid state meta-thesis reaction method

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.

Download Full-text

Enhanced photoluminescence of Li3Ba2Gd3 (MoO4)8:Eu3+ red phosphor synthesized by mechanochemically assisted direct solid state reaction method at room temperature

Journal of Materials Science Materials in Electronics ◽

10.1007/s10854-014-2645-0 ◽

2014 ◽

Vol 26 (4) ◽

pp. 2045-2052 ◽

Cited By ~ 3

Author(s):

Anthuvan John Peter ◽

I. B. Shameem Banu

Keyword(s):

Solid State ◽

Solid State Reaction ◽

Room Temperature ◽

Solid State Reaction Method ◽

Red Phosphor ◽

Reaction Method ◽

Enhanced Photoluminescence ◽

Direct Solid

Download Full-text

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.

Download Full-text

Synthesis and luminescence properties of novel deep red emitting phosphors Li2MgGeO4:Mn4+

Functional Materials Letters ◽

10.1142/s1793604715500460 ◽

2015 ◽

Vol 08 (04) ◽

pp. 1550046 ◽

Cited By ~ 13

Author(s):

Renping Cao ◽

Dong Ceng ◽

Xiaoguang Yu ◽

Siling Guo ◽

Yufeng Wen ◽

...

Keyword(s):

High Temperature ◽

Solid State ◽

White Light ◽

Doping Concentration ◽

Broad Band ◽

Solid State Reaction Method ◽

Red Phosphor ◽

Light Emitting ◽

Reaction Method ◽

White Light Emitting Diodes

Novel deep red phosphor Li 2 MgGeO 4: Mn 4+ is synthesized by high temperature solid state reaction method in air. The strongest PL band peaking at ~ 671 nm in the range of 600–750 nm is due to the 2E → 4A2 transition of Mn 4+ ion and the PLE spectra shows broad band peaking at ~ 323 within the range 220–550 nm owing to the 4A2 → 4T1 transitions of Mn 4+ ion. The optimum Mn 4+ doping concentration is about 0.4 mol.%. The luminous mechanism is explained by Tanabe–Sugano diagram of Mn 4+ ion. The results indicate that red phosphor Li 2 MgGeO 4: Mn 4+ is a beneficial phosphor for use in white light-emitting-diodes (LEDs).

Download Full-text