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Effects of Tm 3+ concentration on upconversion luminescence and temperature‐sensing behavior in Tm 3+ /Yb 3+ :Y 2 O 3 nanocrystals
Author(s) -
Chen Guangrun,
Lei Ruoshan,
Huang Feifei,
Wang Huanping,
Zhao Shilong,
Xu Shiqing
Publication year - 2018
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3544
Subject(s) - photon upconversion , nanocrystal , analytical chemistry (journal) , ion , materials science , excitation , luminescence , fluorescence , emission intensity , chemistry , optoelectronics , optics , nanotechnology , physics , organic chemistry , chromatography , engineering , electrical engineering
The effects of Tm 3+ concentration on upconversion emission and temperature‐sensing behavior of Tm 3+ /Yb 3+ :Y 2 O 3 nanocrystals were investigated. Blue and red emissions were observed under 980 nm excitation. Both upconversion emissions and the blue to red intensity ratio were found to decrease with increasing Tm 3+ concentration. The temperature‐sensing performances of the samples were studied, the fluorescence intensity ratio of 1 G 4(a) → 3 H 6 (477 nm) and 1 G 4(b) → 3 H 6 (490 nm) transitions from Tm 3+ ions was chosen as the thermometric index. The results showed that the sensor sensitivity was sensitive to Tm 3+ ion concentration. The maximum sensitivity of ~32 × 10 −4 K −1 was obtained for 0.1%Tm 3+ /5%Yb 3+ :Y 2 O 3 nanocrystals at 344 K. Moreover, a marked optical induced heating effect was also found in the nanocrystals. The prepared Tm 3+ /Yb 3+ :Y 2 O 3 nanocrystals could be used in temperature‐sensing probes and in optical heaters.