Design of Dual-Mode Optical Thermometry Based on Thermally Activated Efficient Energy Transfer in LaNbO₄/Ln³⁺ (Eu³⁺/Sm³⁺/Pr³⁺) Phosphors

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(42), P. 57421 - 57427

Published: Oct. 9, 2024

Exploring methods to achieve high thermal stability in phosphors is of great significance for their applications high-temperature fields. Currently, energy transfer (ET) from the host activator lanthanide ions (Ln3+) an effective approach improving antithermal quenching phosphors. In this contribution, LaNbO4 (LNO) with efficient blue emission used as construct host–Ln3+ dual-emitting LNO/Ln3+ (Eu3+/Sm3+/Pr3+) phosphor system, and ET efficiency under activation investigated. Experimental results indicate that temperature rises, LNO Ln3+ increases, resulting completely opposite luminescent responses between Ln3+. That is, undergoes quenching, while exhibits where integrated luminescence intensity at 498 K 2.50–3.73 times 298 K. Therefore, based on differing response trends peaks phosphors, a dual-mode optical sensing system can be designed using fluorescence ratio color change, achieving relative sensitivity. Thus, work provides new insights into design sensing.

Language: Английский

Improving the thermal stability of Pr3+-based niobate phosphor by adjusting the energy level of intervalence charge transfer band

Ceramics International, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 1, 2024

Language: Английский