Insights into the discrepant luminescence for BaSiO₃:Eu²⁺ phosphors prepared by solid‐state reaction and precipitation reaction methods

Abstract

Two synthesis routes, solid-state reaction and precipitation reaction, were employed to prepare BaSiO :Eu phosphors in this study. Discrepancies in the luminescence green emission at 505 nm for the solid-state reaction method sample and in the yellow emission at 570 nm for the sample prepared by the precipitation reaction method, were observed respectively. A detail investigation about the discrepant luminescence of BaSiO :Eu phosphors was performed by evaluation of X-ray diffraction (XRD), photoluminescence (PL)/photoluminescence excitation (PLE), decay time and thermal quenching properties. The results showed that the yellow emission was generated from the BaSiO :Eu phosphor, while the green emission was ascribed to a small amount of Ba SiO :Eu compound that was present in the solid-state reaction sample. This work clarifies the luminescence properties of Eu ions in BaSiO and Ba SiO hosts.

Co-Doping Effect on the Optical Properties of Eu(2+/3+) Doped in BaSiO3

“…Specially, the optical properties of BaSiO 3 :Eu 2+ are highly sensitive to the presence or absence of the minor second phase in the crystal structure, even though this is not true of other materials. The main reason that previously reported results are slightly different may be due to the difficulties involved in achieving single-phase BaSiO 3 :Eu 2+ fabrication without having some minor peaks [ 10 , 12 , 13 ].…”

Highly efficient green-emitting ZnO:Cu2+ phosphors for NUV-pumped white-emitting diodes

“…3 Currently, conventional Ce 3+ /Eu 2+ -based materials are often used as commercial green phosphors for WLED applications, such as SiAlON:Eu 2+ , (Ba,Sr)Si 2 O 2 N 2 :Eu 2+ , Ca 3 Sc 2 Si 3 O 12 :Ce 3+ , and Ba 2 SiO 4 :Eu 2+ powders. [4][5][6][7] The key advantage of these materials lies in their high light output, perfectly meeting the requirements for various applications. However, a significant challenge arises from the fact that rare earths, the primary components of these materials, are prohibitively expensive and scarce due to their extremely low abundance on Earth.…”