Investigation on combustion derived BaMgAl₁₀O₁₇:Eu²⁺phosphor powder and its corresponding PVP/BaMgAl₁₀O₁₇:Eu²⁺nanocomposite

Abstract

This work focuses on the study of BaMgAl10O17:Eu(2+) (BAM:Eu) nanophosphors prepared by a microwave-assisted combustion procedure and more especially on the polymer/BAM:Eu nanocomposite film suitable for optical devices such as solid-state-lighting. Powder presented a specific nanomorphology, highly friable and thus easily ground into fine particles. They were then homogeneously dispersed into a polymer solution (poly(N-vinylpyrrolidone) or PVP) to elaborate a polymer phosphor nanocomposite. The structural, morphological and optical features of the nanocomposite film have been studied and compared to those of a pristine PVP film and BAM:Eu powder. All the characterizations (XRD, SEM, SAXS, etc.) proved that the blue phosphor nanoparticles are well incorporated into the polymer nanocomposite film which exhibited the characteristic blue emission of Eu(2+) under UV light excitation. Furthermore, the photostability of the polymer/phosphor nanocomposite film has been studied after exposure to accelerated artificial photoageing at wavelengths above 300 nm.

Spectroscopic study and enhanced thermostability of combustion-derived BaMgAl 10 O 17 :Eu 2+ blue phosphors for solid-state lighting

“…It is very different from powders prepared by MISCS which are nanostructured and homogeneous. As a result, these particles can be easily dispersed in a medium, for instance to elaborate homogeneous luminescent coatings from phosphors in suspension [38] whereas particles with a very dense and large size distribution cannot.…”

“…MISCS is a hopeful process in terms of energy saving and equipment and can produce a large variety of oxides within a short duration from cheap precursors (nitrates and an organic fuel) [36,37]. Without further calcination, it leads to well-crystallized powders characterized by small grain sizes with a narrow size distribution easily dispersible in common solvents or polymers [38]. This feature allows, for instance, shaping the materials as homogeneous films suitable for LEDs based lighting devices.…”

Enhanced Luminescence in the SrMgAl10O17: Eu2+ Blue Phosphor Prepared by a Hybrid Urea‐Sol Combustion Route

“…Where X c is the critical concentration for quenching, Z the number of cations in the unit cell and V the volume of the unit cell. By taking the values of X c = 0.10, Z = 2, and V = 611.09 Å, the critical distance R c is then calculated to be about 22.7Å.…”

“…Strontium magnesium aluminate phosphors have attracted much attention as promising luminescent materials that are widely used in lighting and displays, due to their outstanding chemical and thermal stability, high quantum efficiency, and interesting optical properties . The Eu 2+ ‐activated SrMgAl 10 O 17 (SAM) or BaMgAl 10 O 17 (BAM) blue‐emitting phosphors have already been widely applied in fluorescent lamps (FL), plasma display panels (PDP), field‐emission displays (FED), and tricolor lamps .…”

“…Strontium magnesium aluminate phosphors have attracted much attention as promising luminescent materials that are widely used in lighting and displays, due to their outstanding chemical and thermal stability, high quantum efficiency, and interesting optical properties. [1][2][3] The Eu 2+ -activated SrMgAl 10 O 17 (SAM) or BaM-gAl 10 O 17 (BAM) blue-emitting phosphors have already been widely applied in fluorescent lamps (FL), plasma display panels (PDP), field-emission displays (FED), and tricolor lamps. [4][5][6] Recently, these phosphors, combined with a UV LED and green/red phosphors, are expected to yield high-color-rendition white LEDs (i.e., Ra > 90) that are targeted for general illumination, medical operations, photo video studios, museums, and so on.…”