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

Abstract

Improving luminescent intensity is a significant technical requirement and scientific problem for the luminescent performance of fluorophor materials through the ages. The process control and luminescence performance still limit the developments of luminescent intensity even through it can be improved partly by covering or magnetron sputtering of precious metals on the surface of the fluorophore materials. On the basis of the improvement of luminescence center radiative transition rate by surface plasma resonance and Y2O3:Eu 3+ microsheet phosphors, a fundamental model for topological luminophor Y2O3:Eu 3+ +Ag was designed referencing the concepts of topological materials in order to enhance luminescent performance by composite-luminescence, which composed of Eu 3+ centric electroluminescence and surface plasma-enhanced photoluminescence by Ag. The topological luminophor Y2O3:Eu 3+ +Ag was successfully synthesized with an asymmetric-discrete Ag nanocrystal topological structure on the surface just via illumination. Experiment results suggest that the luminescence performance of topological luminophor Y2O3:Eu 3+ +Ag increased by about 300% compared with that of Y2O3: Eu 3+ phosphors on the same conditions. The design of a topological luminophor provides a new approach to further improve the luminescent intensity of phosphors.

Reinforcing Increase of ΔTc in MgB2 Smart Meta-Superconductors by Adjusting the Concentration of Inhomogeneous Phases

“…In this work, three types of MgB 2 raw materials, namely, a MgB 2 , b MgB 2 , and c MgB 2 , were prepared with particle sizes decreasing in order. Two types of inhomogeneous phases, namely, Y 2 O 3 :Eu 3+ and Y 2 O 3 :Eu 3+ /Ag, were also prepared based on our previous preparation method [ 43 , 44 ]. Two other types of non-EL dopants, namely, Y 2 O 3 and Y 2 O 3 :Sm 3+ , were also prepared for comparison.…”

Smart meta-superconductor MgB2 constructed by the dopant phase of luminescent nanocomposite

“…In this paper, a kind of new phase of luminescent nanocomposite Y 2 O 3 :Eu 3+ /Ag was prepared by compounding nano Ag into the Y 2 O 3 :Eu 3+ matrix directly 48 . The luminescent intensity of Y 2 O 3 :Eu 3+ /Ag is three times higher than that of Y 2 O 3 :Eu 3+ due to the composite illumination of EL and photoluminescence (PL).…”

Enhanced Capture of Broadband Solar‐Blind UV Light via Introducing Alkali‐Metal Ions (Li+, Na+, and K+) into DC Spectral Converter

“…The emission spectra of samples excited by different wavelengths are composed of several sharp emission peaks ranging from 500 to 700 nm, which correspond to the transitions from the 5 D 0 state to the 7 F j ( j = 0, 1, 2, and 3) state of 4f configuration of Eu 3+ ions. [ 51,52 ] The possible transition processes are indicated systematically in energy level diagram of Eu 3+ ions (Figure 1). The most sensitive transition 5 D 0 → 7 F 2 shows two peaks at ≈612, 629 nm with high intensity, which is caused by electrical dipole transition.…”