Photoluminescence based temperature monitoring in high-temperature energy applications: a proof-of-concept study

Research Project, 2026 – 2027

The project aims to develop and evaluate a novel method for precise and rapid temperature measurement in high-temperature reactors, especially in energy applications where the decarbonization of industrial processes requires new technology to ensure energy efficiency and reliability. The method utilizes the temperature-dependent luminescence from inorganic phosphors, specifically yttrium aluminum garnet (YAG) doped with rare earth ions (such as Ce3+, Dy3+, Tm3+). When excited with blue light, these materials emit light whose intensity decreases as the temperature rises (known as thermal quenching). Previous research has shown that this technique works as a temperature probe in high-temperature alloys. The project's main goal is a proof-of-concept study, integrating the technology into measurement cells used for corrosion research in chemical looping processes. A key objective is to optimize the type and concentration of rare earth ions for the desired temperature range. The project, scheduled for 18 months starting January 2026, involves three senior researchers and one postdoc. The long-term ambition is to enable wide industrial adoption, e.g., for monitoring solid oxide fuel cells. The project requests funding for a postdoc salary, as well as equipment and materials. It is also hoped that, after proof-of-concept, the technique will attract further funding and provide significant societal benefits.