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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Total Internal Reflection Fluorescence Microscopy01:05

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Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
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High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
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How could ratiometric thermometry with thermally activated delayed fluorescent (TADF) emitters practically work?

Markus Suta1

  • 1Inorganic Photoactive Materials, Institute of Inorganic Chemistry, Heinrich Heine University Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany. markus.suta@hhu.de.

Physical Chemistry Chemical Physics : PCCP
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Summary

Thermally activated delayed fluorescent (TADF) emitters show promise for luminescence thermometry, offering a new avenue for remote temperature sensing. Understanding their unique properties is key to developing advanced temperature measurement tools.

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Area of Science:

  • Materials Science
  • Physical Chemistry
  • Optics

Background:

  • Luminescence is a temperature-dependent phenomenon, enabling remote temperature sensing via luminescence thermometry.
  • While inorganic phosphors are widely used, thermally activated delayed fluorescent (TADF) emitters remain underexplored for this application.

Purpose of the Study:

  • To provide guidelines for using TADF emitters as luminescent thermometers.
  • To differentiate TADF emitters from inorganic phosphors in thermometry applications.

Main Methods:

  • Theoretical analysis of TADF emitter properties relevant to thermometry.
  • Investigating the influence of photophysical parameters on temperature sensing capabilities.

Main Results:

  • The dynamic working range of TADF-based thermometers is governed by the interplay of intersystem crossing and radiative decay rates.
  • Guidelines for optimizing TADF emitter design for luminescence thermometry were established.

Conclusions:

  • TADF emitters present a viable and promising alternative for advanced luminescence thermometry.
  • Further research, building on foundational work, can unlock the full potential of TADF emitters in temperature sensing.