Hypersensitive and color-tunable temperature sensing properties of (Eu,Tb)(AcAc)3phen via phonon-assisted energy transfer
Source abstract
Abstract
Abstract In this paper, the temperature sensing properties of (Eu,Tb)(AcAc)3phen (AcAc− and phen stand for acetylacetonate and 1,10-phenanthroline, respectively) are reported. This temperature sensor uses fluorescence intensity ratio (FIR) between emissions of Eu3+ (red) and Tb3+ (green). While the molar ratio between Eu3+ and Tb3+ is 1, the relative sensitivity keeps high value (>3%∙K−1) near room temperature (−40 °C–50 °C), reaching its maximum as 4.1%∙K−1. In addition, the minimum of temperature uncertainty (0.0043 K) is superior to those reported in literature in our knowledge. The emission color of sample is acutely temperature sensitive (green to red). The temperature sensing mechanism is via phonon-assisted energy transfer. It is proved that the major energy transfer route is from 5D4(Tb3+) to 5D1(Eu3+). Moreover, the functional relationship between FIR and absolute temperature T is demonstrated by rate equations firstly in phonon-assisted energy transfer case.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Lanthanide and Transition Metal Complexes · Luminescence Properties of Advanced Materials · Luminescence and Fluorescent Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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