Novel Energy-Transfer Route and Enhanced Luminescent Properties in YVO₄:Eu³⁺/YBO₃:Eu³⁺ Composite

Abstract

In this paper, YVO4:Eu3+/YBO3:Eu3+ composite was fabricated by chemical corrosion through a two-step hydrothermal process, i.e., first preparation of YBO3:Eu3+ nanocrystals and subsequent chemical corrosion by Na3VO4 solution. A novel energy-transfer and luminescent route via UV and VUV excitation was identified (YBO3 phase→ YVO4 phase → Eu3+ ions in the YVO4 phase), which remained in the sample annealed at high temperature. In this composite high quantum yield was maintained, and considerably improved color purity was induced. A corrosive interface between the YVO4:Eu3+ and YBO3:Eu3+ phases was identified by the site-selective excitation technique, where the local environment surrounding Eu3+ was extremely complex. It is believed that, through further optimization, this novel composite can be candidate phosphors for red PDPs and Hg-free fluorescent lamp in the future.

Morphology evolution of Gd0.99Eu0.01BO3 phosphors synthesized by hydrothermal method with Gd0.99Eu0.01(OH)3 nanorods as sacrificial precursors

“…Among LnBO 3 materials, GdBO 3 , which processes the hexagonal vaterite-type structure and shows a good vacuum ultraviolet (VUV) absorption, has been a promising host material for doping Eu 3+ VUV phosphors. 24,25 However, GdBO 3 :Eu 3+ M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 4 phosphors derived from conventional solid-state reaction have irregular morphology, which will limit its dispersity and subsequent coating ability on the display panels. Therefore, it is greatly desired to synthesize GdBO 3 :Eu 3+ phosphor with homogeneous and adjustable morphology by a controllable approach.…”

Highly Uniform YBO3 Hierarchical Architectures: Facile Synthesis and Tunable Luminescence Properties

“…[30][31][32] For instance, yttrium orthoborate (YBO 3 ) has attracted much attention because of its low toxicity, strong luminescence intensity, high chemical stability, and exceptional optical damage threshold. [33,34] To date, various morphologies of YBO 3 have been synthesized according to different methods, such as well-dispersed nanocrystals, [33,34] one-dimensional (1D) nanowires and nanotubes, [37] drum-like microcrystals, [38] 3D flower-like architectures, [39] and core-shell structures. [40] To the best of our knowledge, there have been few reports on the synthesis of multilayered YBO 3 microstructures with a uniform pancake-like shape.…”

Morphologies of GdBO3:Eu3+ one-dimensional nanomaterials

“…Recently, some new methods, such as sol-gel method [6,7], spray pyrolysis [8], combustion synthesis [9], hydrothermal/solvothermal synthesis [10][11][12][13][14][15][16][17][18][19][20][21][22][23], co-precipitation method [24], electrospinning method [25], etc., have been employed to reduce the reaction temperature for obtaining REBO 3 :Eu 3+ nanomaterials. REBO 3 :Eu 3+ nanoparticles [10], nanotube and nanowires [25], drum-like microcrystals [13], donut-like assemblies [11,19], etc., have been successfully synthesized.…”

“…Especially, the hydrothermal/solvothermal method is widely used to synthesize rare earth orthoborates powders as well as to control their microstructures [10][11][12][13][14][15][16][17][18][19][20][21][22][23]. The controlled synthesis of nanomaterials with uniform size and morphology has attracted much attention due to their novel properties for theoretical studies and potential applications in optics, electronics, magnetism and catalysis [28][29][30].…”