The multidisciplinary team from diverse fields has overcome this obstacle by developing oxidation-resistant iridium-based selective emitters. Iridium, known for its exceptional oxidation resistance at high temperatures, has been tailored at the nanoscale using magnetron sputtering to exhibit unique optical properties, making it a promising candidate for selective emitters in TPV applications.
"By avoiding the adverse effects of oxidation, we have unlocked the potential for more efficient and sustainable systems." reports Gnanavel Vaidhyanathan Krishnamurthy, lead author of the study and a scientist at the Helmholtz-Zentrum Hereon. "This innovation opens the doors to new possibilities in waste heat recovery, solar thermal power generation and beyond."
The key highlight of this work include: experimentally demonstrating the thermal stability of the selective emitter at 1000 °C for 100 h at technical vacuum conditions by state-of-the-art in-situ x-ray diffraction facilities. The results of the current work align with global efforts to transition towards cleaner and more sustainable energy sources, contributing to reducing greenhouse gas emissions and dependence on fossil fuels.
The research work is part of the Collaborative Research Centre SFB 986, which deals with tailor-made multiscale material systems.
Publication:
Krishnamurthy, G. V., Chirumamilla, M., Krekeler, T., Ritter, M., Raudsepp, R., Schieda, M., Klassen, T., Pedersen, K., Petrov, A. Yu., Eich, M., Störmer, M., Iridium Based Selective Emitters for Thermophotovoltaic Applications. Adv. Mater. 2023, 2305922. https://doi.org/10.1002/adma.202305922
Contacts:
Dr. habil. Alexander Petrov
Institute of Optical and Electronic Materials, TUHH
a.petrov@tuhh.de
Prof. Dr. Manfred Eich
Institute of Optical and Electronic Materials, TUHH
m.eich@tuhh.de
Dr. Michael Störmer
Institute of functional materials for sustainability, Helmholtz-Zentrum Hereon
michael.stoermer@hereon.de