OPTICAL AND LUMINESCENCE PROPERTIES OF NANO BaMoO4 CO-DOPED Eu3+, Mn2+ SYNTHESIZED BY HYDROTHERMAL METHOD

Abstract

This study analyzes the optical properties and luminescence of nano BaMoO₄ co-doped Eu³⁺, Mn²⁺ (BMEM), which have been successfully synthesized by hydrothermal method. The diffuse reflectance spectrum (DRS) confirmed that nanomaterials BMEM absorb light in the ultraviolet region with bandgap energies about 4.0833 – 4.1250 eV. The photoluminescence excitation and photoluminescence spectra demonstrated that nanomaterials BMEM have the ability to fluoresce red with great intensity at about 616 nm, corresponding to the ⁵D₀ → ⁷F₂ transition of Eu³⁺ ions. Mechanism of fluorescence quenching by dipole-dipole interaction, the host efficiently transfers energy to Eu³⁺ ion with a critical distance of 10.62 Å, the highest luminescence lifetime is 1.06432 ms. With the ability to emit high-intensity red light for a long time, nanomaterials BMEM have the potential to be applied in the manufacture of white, warm and low-energy LEDs.