Temperature sensing of Sr₃Y₂Ge₃O₁₂:Bi³⁺,Sm³⁺ garnet phosphors with tunable sensitivity

Abstract

A novel temperature-sensitive material, Sr3Y2Ge3O12:Bi3+,Sm3+ phosphor, was successfully synthesized by a solid-state reaction method. Under 376 nm light excitation, the prepared phosphors present both the blue emission of Bi3+ and...

Improved visible light triggered photocatalytic activities of BiOCl photocatalysts via a synergistic effect of doping and heterojunction engineering

“…2(a) illustrates the typical excitation ( λ em = 598 nm) and emission ( λ ex = 408 nm) spectra of BiOCl:0.010Sm 3+ microplates. As is shown, there are several peaks centered at approximately 365, 380, 408, 418, 442, and 487 nm, which are ascribed to the transitions from the 6 H 5/2 level to 4 D 3/2 , 4 P 7/2 , 4 L 13/2 , 4 G 9/2 , 4 I 15/2 and 4 I 9/2 levels, respectively, 41,42 in the excitation spectrum. Herein, we selected 408 nm as the excitation wavelength since it exhibits the strongest intensity.…”

“…Herein, we selected 408 nm as the excitation wavelength since it exhibits the strongest intensity. Excited at 408 nm, three intense emission bands located at 566, 598 and 649 nm are observed, which correspond to the radiative transitions of Sm 3+ from 4 G 5/2 to 6 H 5/2 , 6 H 7/2 and 6 H 9/2 levels, respectively, 41,42 in the emission spectrum (see Fig. 2(a)).…”

Visualized real-time flexible high-temperature sensing in Eu3+/Tb3+-doped Y2Mo3O12 negative thermal expansion material films

“…At the same time, their sensitivity is positively correlated with the energy range, resulting in limited sensitivity. [22][23][24][25][26] Therefore, the limitations of thermal quenching (TQ) and thermal coupling energy level differences restrict the application of rare earth-doped non-contact FIR temperature sensors.…”