Eintrag in der Universitätsbibliographie der TU Chemnitz
Volltext zugänglich unter
URN: urn:nbn:de:bsz:ch1-qucosa2-878080
Lungwitz, Frank
Gemming, Sibylle (Prof. Dr.) ; Galindo, Ramon Escobar (Prof. Dr.) (Gutachter)
Development of Tantalum-Doped Tin Oxide as New Solar Selective Material for Solar Thermal Power Plants
Kurzfassung in englisch
Solar absorber coatings are one of the key components in concentrated solar power (CSP) plants. Currently operating at temperatures up to 565°C and suffering from emissive losses, their energy conversion efficiency could be improved by applying high-temperature stable materials with solar selective properties, i.e. high absorptivity and low emissivity. In this work, the transparent conductive oxide (TCO) SnO2:Ta is developed as a solar selective coating (SSC) for CSP absorbers. Starting with simulations covering basic requirements for SSCs, the deposition process of SnO2:Ta is optimized and extensive optical characterization and modelling are performed. It is shown that upon covering with a SiO2 antireflective layer, a calculated absorptivity of 95% and an emissivity of 30% are achieved for the model configuration of SnO2:Ta on top of a perfect black body (BB). High-temperature stability of the developed TCO up to 800 °C is shown in situ by spectroscopic ellipsometry and Rutherford backscattering spectrometry. The universality of the concept is then demonstrated by transforming silicon and glassy carbon from non-selective into solar selective absorbers by depositing the TCO on top of them. Finally, the energy conversion efficiencies ηCSP of SnO2:Ta on top of a BB and an ideal non-selective BB absorber are compared as a function of solar concentration factor C and absorber temperature TH.
| Universität: | Technische Universität Chemnitz | |
| Institut: | Professur Theoretische Physik quantenmechanischer Prozesse und Systeme | |
| Fakultät: | Fakultät für Naturwissenschaften | |
| Dokumentart: | Dissertation | |
| Betreuer: | Gemming, Sibylle (Prof. Dr.) | |
| URL/URN: | https://nbn-resolving.org/urn:nbn:de:bsz:ch1-qucosa2-878080 | |
| SWD-Schlagwörter: | Solarthermie , Transparent-leitendes Oxid , Hochtemperatur | |
| Freie Schlagwörter (Englisch): | concentrated solar power , solar thermal electricity , solar-selective transmitter , transparent conductive oxide , high-temperature , in situ , magnetron sputtering , spectroscopic ellipsometry , Rutherford-backscattering spectrometry , tin oxide | |
| DDC-Sachgruppe: | Physik | |
| Sprache: | englisch | |
| Tag der mündlichen Prüfung | 28.07.2023 |
