MgGd₄Si₃O₁₃:Ce³⁺, Mn²⁺: A Dual-Excitation Temperature Sensor

Abstract

A novel apatite-based phosphor MgGd 4 Si 3 O 13 [Mg 2 Gd 8 (SiO 4 ) 6 O 2 ]:Ce 3+ , Mn 2+ was designed and successfully synthesized by a solid-state reaction. Based on the different luminescence properties under 298 and 340 nm excitations, its potential application as a dual-excitation luminescent ratiometric thermometer was studied in detail. Under the excitations of 298 and 340 nm, the fluorescent intensity ratio of Ce 3+ and Mn 2+ is linearly correlated in the temperature range of 303–473 K. The sensitivity showed an opposite trend with the increase of temperature, and the maximum value was 0.95% K –1 . These results indicated that MgGd 4 Si 3 O 13 : Ce 3+ , Mn 2+ can be used as an ideal dual-excitation luminescent ratiometric thermometer.

Realizing a broad-scope and high-sensitivity optical thermometer based on dual-emission centers with structure confinement effect-related energy transfer

“…21,22 Based on these characteristics, a good signal discrimination and a high emission intensity are expected in Ce 3+ and Mn 2+ co-doped K 7 CaLn 2 B 15 O 30 (Ln = Lu, Y, Gd) materials, which are very important for FIR-mode thermometry. To date, even though the previous studies have employed ratiometric thermometers based on Ce 3+ and Mn 2+ dual-emitting centers, [23][24][25][26] the performance (e.g., S r changes from 0.40% K À1 to 3.16% K À1 ) obtained has significant differences. Especially, the site environments usually are associated with the thermal quenching behaviors of luminescence centers.…”

Novel dual spectral conversion via Eu2+, Cu+-coactivated core–shell-structured CaS@CaZnOS phosphors for efficient photosynthesis of plants

“…Two types of dual-LCAs, i.e. , ultraviolet to blue/red light (VTBR), ultraviolet/green to blue/red light (VGTBR) can maximize solar energy use in the following examples: Na 3 La(PO 4 ) 2 /LaPO 4 :Eu (VTBR), 33 Lu 3 Al 5 O 12 :10%Ca 2+ , x Bi 3+ , y Mn 4+ (VTBR), 34 Ba 3 Y 2 WO 9 :Mn 4+ (VGTR), 35 BaGeF 6 :Mn 4+ @PPG-NaGdF 4 :Dy 3+ (VTBR), 36 MgGd 4 Si 3 O 13 :Ce 3+ ,Mn 2+ (VTBR), 37 etc. Therefore, DE 2 phosphors are ideal materials for promoting plant growth, such as CaS:Eu 2+ ,Cu + , 17,38 CaS:Eu 2+ ,Pb 2+ @CaZnOS:Pb 2+ , 39 Sr 2 Si 5 N 8 @SrSi 2 O 2 N 2 :Eu 2+ , 40 Na 2 Sr 1.5 B 3 P 12 O 37 :Eu 2+ ,Mn 2+ 41 etc.…”