Rapid, Room Temperature Synthesis of Eu³⁺ Doped NaBi(MoO₄)₂ Nanomaterials: Structural, Optical, and Photoluminescence Properties

Abstract

Bismuth based host materials for doping rare earth ions gained considerable interest due to the possibility of forming crystalline homogeneous solid solution phases over a wide range and their excellent luminescent properties. In the present manuscript, a facile synthesis method for preparation of nanocrystalline NaBi(MoO 4 ) 2 and their optical properties are presented. The influence of various synthetic parameters such as precursor concentration, reaction time and reaction temperature on phase formation have been investigated and revealed that these nanoparticles can be synthesized even at 5 °C within 5 min with a Bi/Mo ratio of 1:4. All the doped and undoped samples show scheelite type tetragonal structure. Formation of solid solution between NaBi(MoO 4 ) 2 and NaEu(MoO 4 ) 2 over the complete range of compositions could be achieved. A systematic decrease in the unit cell parameters is observed with increasing concentration of Eu 3+ ion in NaBi 1−x Eu x (MoO 4 ) 2 . Investigations on the luminescence properties of europium doped samples show excellent red luminescence upon excitation at 465 nm. The quantum efficiency calculated from experimental luminescence studies shows optimum photoluminescence properties in NaBi 0.9 Eu 0.1 (MoO 4 ) 2 nanoparticles with the highest quantum efficiency of 50%.

Excitation dependent visible and NIR photoluminescence properties of Er3+, Yb3+ co-doped NaBi(MoO4)2 nanomaterials

“…27 Very recently, our group has been reported the room temperature synthesis of Eu 3+ doped NaBi(MoO 4 ) 2 nanomaterials and their luminescence properties. 24 In the present manuscript, we are reporting visible and NIR photoluminescence of NaBi 0.9Àx -Er x Yb 0.1 (MoO 4 ) 2 nanomaterials upon UV, visible and NIR excitations. To the best of authors knowledge, so far there is no report on visible, NIR and upconversion luminescence properties of NaBi 0.9Àx Er x Yb 0.1 (MoO 4 ) 2 nanomaterials.…”

“…Recently, reports on lanthanide doped bismuth based nanomaterials are increasing gradually due to its advantages over rare earths such as nontoxic nature, more abundant, less expensive and an environment ecofriendly, which could be termed as 'Green Bismuth'. [17][18][19][20][21][22][23][24][25][26][27] Also, ionic size, charge, coordination number of bismuth is similar to rare earth ions. Bismuth activated materials are known to have their characteristic emission properties which makes them more important class of luminescent materials.…”

A review on the structural dependent optical properties and energy transfer of Mn4+ and multiple ion-codoped complex oxide phosphors

“…The PLE spectrum monitored at 714 nm consists of two strong excitation peaks centered at 340 and 484 nm, which are attributed to the spin-allowed 4 A 2g / 4 T 1g and 4 A 2g / 4 T 2g transitions of Mn 4+ , respectively. [148][149][150][151][152] The obvious spectral overlap between the Ln 3+ emission band and Mn 4+ excitation band indicates the possible resonant energy transfer from Ln 3+ to Mn 4+ . As evidenced in Fig.…”

Terbium doped LiLuF4 nanocrystal scintillator-based flexible composite film for high resolution X-ray imaging

“…[8][9][10] Typically, nanomaterials require low temperatures for synthesis, and their structural and optical properties are easily tuned. [11][12][13][14] Meanwhile, nanomaterials have excellent mouldability and are suitable for the development of exible devices. Through ligand modication, it has advantages in developing scintillation screen with organic matrix composites.…”