Faculty Publications

High-Resolution Thermal Micro-Imaging Using Europium Chelate Luminescent Coatings

Document Type

Article

Keywords

Cryogenics, Engineering, Europium chelate, Fluorescence, High-temperature superconductivity, Issue 122, Optical microscopy, Self-heating, Semiconductor

Journal/Book/Conference Title

Journal of Visualized Experiments

Volume

2017

Issue

122

Abstract

Micro-electronic devices often undergo significant self-heating when biased to their typical operating conditions. This paper describes a convenient optical micro-imaging technique which can be used to map and quantify such behavior. Europium thenoyltrifluoroacetonate (EuTFC) has a 612 nm luminescence line whose activation efficiency drops strongly with increasing temperature, due to T-dependent interactions between the Eu3+ ion and the organic chelating compound. This material may be readily coated on to a sample surface by thermal sublimation in vacuum. When the coating is excited with ultraviolet light (337 nm) an optical micro-image of the 612 nm luminescent response can be converted directly into a map of the sample surface temperature. This technique offers spatial resolution limited only by the microscope optics (about 1 micron) and time resolution limited by the speed of the camera employed. It offers the additional advantages of only requiring comparatively simple and non-specialized equipment, and giving a quantitative probe of sample temperature.

Department

Department of Physics

Original Publication Date

4-16-2017

DOI of published version

10.3791/53948

Repository

UNI ScholarWorks, Rod Library, University of Northern Iowa

Language

en

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