Ba2LuNbO6:Er3+,Yb3+ up‐conversion phosphors for dual‐mode thermometry based on fluorescence intensity ratio

• DOI: 10.1111/jace.20058
• Publication Date: 2024-08-13T04:20:24Z
• Authors: Yang Chen; Junyu Chen; Yuxuan Luo; Qiang Wang; Hai Guo
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract Fluorescence intensity ratio (FIR) thermometry has been regarded as new optical because of its faster response, higher sensitivity, and accuracy. However, improving the sensitivity is still a challenge. Here, Ba 2 LuNbO 6 :Er 3+ ,Yb up‐conversion specimens were synthesized, characterized, designed for dual‐mode based on FIR. The H 11/2 / 4 S 3/2 thermally coupled energy levels (TCELs) F 9/2 non‐TCELs (NTCELs) Er selected two FIR modes thermometry. gap TCELs in phosphors was confirmed 977 cm −1 . Therefore, maximal relative ( r ) 1.53% K @ 303 K. For NTCELs, value 1.81% obtained, which surpasses other ‐doped specimens. In addition, exhibit excellent thermal fatigue resistance temperature resolution. Results suggest that might be applied sensing field.