Low-temperature optical thermometer based on the luminescence of the double perovskite Ba2MgWO6: Nd3

• Published in: Journal of luminescence 2023-05, Vol.257, p.119750, Article 119750
• Main Authors: Vu, T.H.Q., Bondzior, Bartosz, Stefańska, Dagmara, Dereń, Przemysław J.
• Format: Article
• Language: English
• Subjects: Double perovskites; Low-temperature optical thermometer; Luminescence; Neodymium; Relative sensitivity
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2023.119750

Here, we report Nd3+ - doped Ba2MgWO6 (BMW) as a potential remote luminescent thermometer, working over a wide operating temperature range up to 673 K. The crystal structure, morphology and luminescence of samples were characterized. The lifetime of Nd3+4F3/2 decreases from 0.55 ms to 0.46 ms when the content of Nd3+ increases caused by the cross-relaxation. The temperature sensing ability of Ba2MgWO6 was evaluated for the first time by applying the thermally coupled Nd3+ levels as well as based on the emissions ratio of Nd3+ ions and the host. An impressive maximum of relative sensitivity (Sr = 4.46%K−1 at 198 K) with very small uncertainty (δT=0.005K) working in 77–248 K was achieved for the sample BMW: 4%Nd3+. The results promote the BMW: Nd3+ double perovskite as a promising optical thermometer that can operate in a wide operating temperature, especially in the low – temperature range. [Display omitted] •The temperature detection performance of Ba2MgWO6(BMW): Nd3+,Li+ ions was studied.•The best relative sensitivity for BMW: Nd3+, Li+ was equal to 4.46 %K−1 at 198 K.•High repeatability (99.55%) and uncertainty (δTm=0.005K) were achieved.