Rare-Earth-Doped Barium Molybdate Up-Conversion Phosphor with Potential Application in Optical Temperature Sensing

Abstract

A BaMoO4:[Er3+]/[Yb3+] up-conversion (UC) phosphor was synthesized by co-precipitation and calcination of the precursor at 800 °C. The main peak (112) for the synthesized phosphor was strongly detected in the XRD pattern and had a tetragonal structure. The doping of rare-earth ions affected the crystal lattice by shifting the main peak, decreasing the lattice constant, and shifting the position of the Raman signal. The synthesized upconverted phosphor exhibited strong green signals at 530 and 553 nm and weak red signals at 657 nm when excited at 980 nm. The green light emission intensity of the UC phosphor increased as the pump power of the laser increased due to the two-photon effect. The synthesized upconverted phosphor was prepared as a pellet and flexible composite. Thermal quenching led to a decrease in luminescence intensity as the temperature increased, which means that the phosphor can be applied to optical temperature sensing.

Investigation of Thermal Sensing in Fluoroindate Yb3+/Er3+ Co-Doped Optical Fiber

“…The first one is based on the CR from 2 H 11/2 and 4 S 3/2 . The second is energy transfer (ETII) from the levels 4 I 13/2 (Er 3+ ) and 2 F 5/2 (Yb 3+ ) ( 2 F 5/2 (Yb 3+ ) + 4 I 13/2 (Er 3+ ) → 2 F 7/2 (Yb 3+ ) + 4 F 9/2 (Er 3+ )) [ 11 , 17 , 18 , 19 , 20 ].…”

A Facile and Fast Synthesis of Barium Molybdate Nanoparticles: Effects of PH and Surfactant

“…Previous research has established that BaMoO 4 particles are synthesized by various fabrication methods such as co-precipitation, hydrothermal, solvothermal, and solid-state. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] It is understood from these studies that the morphological and crystallinity properties of materials are significantly affected by the synthesis methods, precursor materials, surfactants, and solvents used in the production of nanomaterials. This means that nanoparticles with different properties can be fabricated by changing these synthesis parameters.…”