Spatially resolved temperature distribution in a rare-earth-doped transparent glass-ceramic

Sedmak, Ivan (author), Podlipec, Rok (author), Urbančič, Iztok (author), Štrancar, Janez (author), Mortier, Michel (author), Golobič, Iztok (author)

Knowing the temperature distribution within the conducting walls of various multilayer-type materials is crucial for a better understanding of heat-transfer processes. This applies to many engineering fields, good examples being photovoltaics and microelectronics. In this work we present a novel fluorescence technique that makes possible the non-invasive imaging of local temperature distributions within a transparent, temperature-sensitive, co-doped Er:GPF1Yb0.5Er glass-ceramic with micrometer spatial resolution. The thermal imaging was performed with a high-resolution fluorescence microscopy system, measuring different focal planes along the z-axis. This ultimately enabled a precise axial reconstruction of the temperature distribution across a 500-µm-thick glass-ceramic sample. The experimental measurements showed good agreement with computer-modeled heat simulations and suggest that the technique could be adopted for the spatial analyses of local thermal processes within optically transparent materials. For instance, the technique could be used to measure the temperature distribution of intermediate, transparent layers of novel ultra-high-efficiency solar cells at the micron and sub-micron levels.

• Language: English
• Keywords: temperature-dependent fluorescence, co-doped glass-ceramic, axial temperature distribution, micro-scale temperature measurements
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2022
• Number of pages: 11 str.
• Numbering: Vol. 22, iss. 5, art. 1970
• PID: 20.500.12556/RUL-135259
• UDC: 536.5:66.02
• ISSN on article: 1424-8220
• DOI: 10.3390/s22051970
• COBISS.SI-ID: 99512067
• Publication date in RUL: 03.03.2022

Record is a part of a journal

• Title: Sensors
• Shortened title: Sensors
• Publisher: MDPI
• ISSN: 1424-8220
• COBISS.SI-ID: 10176278

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 02.03.2022

Secondary language

• Language: Slovenian
• Keywords: temperaturno odvisna fluorescenca, dopirana steklokeramika, merjenje temperature

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0223
• Name: Prenos toplote in snovi