Modulation of Bi³⁺ luminescence from broadband green to broadband deep red in Lu₂WO₆ by Gd³⁺ doping and its applications in high color rendering index white LED and near-infrared LED

Abstract

Phosphors that exhibit tunable broadband emissions are highly desired in multi-functional LEDs, including pc-WLEDs and pc-NIR LEDs. In this work, broadband emissions were obtained and modulated in the unexpectedly wide...

Multi‐mode temperature sensing of Lu2WO6:Er3+,Yb3+ up‐conversion materials

“…Due to small difference in radius between RE ions, the lattice sites of Lu 3+ in Lu 2 WO 6 readily accommodate the substitution of RE ions to form uniform solid solutions with small distortions, such as Lu 2 WO 6 :Dy 3+ ,Eu 3+ , Lu 2 WO 6 :Bi 3+ ,Gd 3+ , and Lu 2 WO 6 :Bi 3+ ,Eu 3+ /Sm 3+ /Dy 3+ . [18][19][20] These materials are mostly applied in lighting and have not yet been reported for optical temperature sensing. Therefore, in this work, Lu 2 WO 6 was selected as host material.…”

“…The tungstate with exceptional chemical stability and low phonon energy have received considerable interest from numerous scientific researchers. Due to small difference in radius between RE ions, the lattice sites of Lu 3+ in Lu 2 WO 6 readily accommodate the substitution of RE ions to form uniform solid solutions with small distortions, such as Lu 2 WO 6 :Dy 3+ ,Eu 3+ , Lu 2 WO 6 :Bi 3+ ,Gd 3+ , and Lu 2 WO 6 :Bi 3+ ,Eu 3+ /Sm 3+ /Dy 3+ 18–20 . These materials are mostly applied in lighting and have not yet been reported for optical temperature sensing.…”

Optical grade (Gd 0.95- x Lu x Eu 0.05) 3Al 5O 12 ceramics with near-zero optical loss: Effects of Lu 3+ doping on structural feature, microstructure evolution, and far-red luminescence

“…Under far-red light irradiation, the plants would yield shadeavoidance response as if they were blocked from sunlight [7]. Therefore, it is feasible to increase the productivity or adjust the traits of various crops by varying the spectral components (e.g., P R /P FR ratio) in phytotron chambers or greenhouses [8]. The Mn 4+ or Cr 3+ activated luminescent materials can emit far-red light overlapped with the absorption of the phytochrome P FR and thus are frequently used as potential artificial light sources for indoor plant cultivation.…”