Facile preparation and fluorescence enhancement of mesoporous Eu-doped-Y2O3 phosphors

Abstract

Mesoporous europium-doped yttrium oxide phosphors were successfully synthesized by a simple Pechini sol-gel method. The prepared powders were characterized by X-ray diffraction, scanning electron microscopy, Surface area and pore size analyzer and fluorescence spectrophotometer. The XRD spectrum of the calcined samples confirm the presence of Y 2 O 3 . The surface area and pore size analyzer was employed to demonstrate the existence of mesoporous structure in these samples. The room temperature photoluminescence (PL) emissions of Y 2 O 3 :Eu samples can be observed under 245 nm excitation. PL results show that the emission intensity of as-prepared mesoporous Y 2 O 3 :Eu phosphors are higher than that of particles without special structures. Large surface area and pores play an important role in the increasing of PL intensity. The intensity ratio between 5 D 0 ? 7 F 2 and 5 D 0 ? 7 F 1 transitions which related to the local environment of Eu 3? were also studied.

Carbothermal synthesis of CaAlSiN3:Eu2+ red-emitting phosphors and the photoluminescent properties

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Topological Luminophor Y2O3:Eu3++Ag with High Electroluminescence Performance

“…Sato and Ando [40] discussed the theories and developments of topological insulator and topological superconductor since the topological quantum system was introduced for the first time in 1982. However, the combination of topology and materials is one of the vital aspects in the field of materials in the years to come [41][42][43][44] .…”

“…Izumida et al investigated the spectrum of finite-length carbon nanotubes in the presence of on-site and nearest-neighbor superconducting pairing terms. However, the combination of topology and materials is a vital aspects in the field of materials in the years to come. − …”