Achieving high thermal sensitivity from ratiometric CaGdAlO4:Mn4+, Tb3+ thermometers. Issue 38 (6th September 2021)

• Record Type: Journal Article
• Authors: Fang, Yuyin; Zhang, Yuanpeng; Zhang, Yuepin; Hu, Jianxu
• Is Part Of: Dalton transactions. Volume 50:Issue 38(2021)
• Page Start: 13447
• Page End: 13458
• Publication Date: 2021-09-06
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d1dt02185k
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Mn 4+ /Tb 3+ co-doped CaGdAlO4 thermometers are consistently more thermally sensitive than the Eu 3+ co-doped sample. Abstract : The pursuit of optical temperature sensing with high thermal sensitivity to discriminate small temperature changes without contact with the subject possesses a crucial technological and scientific significance. Ratiometric temperature detection based on transition metals and lanthanides emerges as a promising strategy to achieve the purpose due to the dopants' distinct thermal quenching rates. In this work, a new CaGdAlO4 :Mn 4+, Tb 3+ luminescent thermometer was developed. The combination of the highly-thermal-sensitive red emission from Mn 4+ ions with the thermally-robust green emission from Tb 3+ ions renders the thermometer with a maximum relative thermal sensitivity of 2.3% K −1 at 398 K. The well-separated red and green channels in digital images enable further evaluation of thermal sensitivity. The estimated thermal sensitivity is 2.23% K −1 at 398 K from the pixel intensity ratio of red and green channels.