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Optical Thermometry Based on Up‐Conversion Luminescence Behavior of Er 3+ ‐Doped Transparent Sr 2 YbF 7 Glass‐Ceramics
Author(s) -
Li XiaoMan,
Cao JiangKun,
Wei YunLe,
Yang ZhiRong,
Guo Hai
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13804
Subject(s) - materials science , analytical chemistry (journal) , luminescence , ceramic , doping , quenching (fluorescence) , thermal stability , glass ceramic , spectroscopy , nanocrystal , mineralogy , fluorescence , optoelectronics , optics , nanotechnology , chemical engineering , chemistry , composite material , physics , chromatography , quantum mechanics , engineering
Transparent novel glass‐ceramics containing Sr 2 YbF 7 :Er 3+ nanocrystals were successfully fabricated by melt‐quenching technique. Their structural and up‐conversion luminescent properties were systemically investigated by XRD , HRTEM , and a series of spectroscopy methods. The temperature‐dependent up‐conversion spectra prove that 2 H 11/2 and 4 S 3/2 levels of Er 3+ are thermally coupled energy levels ( TCEL ). Consequently, the 2 H 11/2 → 4 I 15/2 and 4 S 3/2 → 4 I 15/2 emissions of Er 3+ in Sr 2 YbF 7 :Er 3+ glass‐ceramics can be used as optical thermometry based on fluorescence intensity ratio ( FIR ) technique. Combined with low phonon energy and high thermal stability, Er 3+ ions in Sr 2 YbF 7 glass‐ceramics present broad operating temperature range (300–500 K), large energy gap of TCEL (786 cm −1 ) and high theoretical maximum value of relative sensitivity (62.14 × 10 −4 K −1 at 560 K), which suggests that Sr 2 YbF 7 :Er 3+ glass‐ceramics may be excellent candidates for optical temperature sensors.