Concentration and pump power-mediated color tunability, optical heating and temperature sensing via TCLs of red emission in an Er³⁺/Yb³⁺/Li⁺ co-doped ZnGa₂O₄ phosphor

Abstract

The Er3+/Yb3+/Li+ co-doped ZnGa2O4 phosphor gives intense red upconversion photoluminescence, color tunability with Er3+ ion concentration and incident pump power, R/G ratio, induced optical heating and temperature sensing characteristics.

Near-Infrared Light Excited Highly Pure Green Upconversion Photoluminescence and Intrinsic Optical Bistability Sensing in a Ho3+/Yb3+ Co-Doped ZnGa2O4 Phosphor through Li+ Doping

“…These peaks are matched with JCPDS file no. 38-1240, as has been reported earlier. , The JCPDS file also confirms that the phase of the prepared phosphor is cubic with space group Fd 3̅ m (227), and the lattice parameters are a = b = c = 8.334 Å and α = β = γ = 90°. The phase of the Ho 3+ /Yb 3+ co-doped phosphor remains unaffected even after Li + doping.…”

“…The XRD peaks of both the phosphors are very intense and sharp, which indicates their highly crystalline nature. It is clear from the figure that the most intense XRD peak is located at 35 30,41 The JCPDS file also confirms that the phase of the prepared phosphor is cubic with space group Fd3̅ m (227), and the lattice parameters are a = b = c = 8.334 Å and α = β = γ = 90°. The phase of the Ho 3+ /Yb 3+ co-doped phosphor remains unaffected even after Li + doping.…”

Lattice-site engineering in ZnGa2O4:Cr3+ through Li+ doping for dynamic luminescence and advanced optical anti-counterfeiting

“…43 But are few reports on the regulation of luminescence by the incorporation of surface modifier ions, such as Li + , Mg 2+ , and Zn 2+ . 51 In this work, a series of ZnGa 2 O 4 :0.005Cr 3+ , xLi + (x = 0-0.08) phosphors were successfully synthesized by substituting Zn 2+ with Li + . Guided by the density functional theory (DFT) calculations, we define the placeholder for the Li + ion and employ a Li + ion as an ideal charge regulator to create oxygen vacancy defects and generate new energy levels, and a series of new fluorescent anti-counterfeit materials with multi-mode phosphors were successfully developed.…”

The geometrical structure and electronic properties of trivalent Ho3+doped Y2O3crystals: a first-principles study

“…Rare-earth (RE) doped laser materials have attracted enormous interests because of their abundant transition channels and sharp luminescence bands. [1][2][3][4][5] The potential applications have been widely investigated in a diversity of elds, such as optical imaging, quantum cascade lasers, high-density optical data storage and biophotonic areas. [6][7][8][9] A recent study reveals that the directly pumped Ho 3+ -doped silica microsphere may be an excellent candidate for fabricating 2 mm laser, which can serve as laser-emitting source for mid-infrared telecommunications.…”