- Titel
- Development of Tantalum-Doped Tin Oxide as New Solar Selective Material for Solar Thermal Power Plants
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:ch1-qucosa2-878080
- Datum der Einreichung
- 22.10.2021
- Datum der Verteidigung
- 28.07.2023
- Abstract (EN)
- 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.
- Freie Schlagwörter (EN)
- 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
- Klassifikation (DDC)
- 530
- Normschlagwörter (GND)
- Solarthermie, Transparent-leitendes Oxid, Hochtemperatur
- GutachterIn
- Prof. Dr. Sibylle Gemming
- Prof. Dr. Ramon Escobar Galindo
- BetreuerIn Hochschule / Universität
- Prof. Dr. Sibylle Gemming
- Den akademischen Grad verleihende / prüfende Institution
- Technische Universität Chemnitz, Chemnitz
- Sonstige beteiligte Institution
- Helmholtz-Zentrum Dresden-Rossendorf, Dresden
- Version / Begutachtungsstatus
- aktualisierte Version
- URN Qucosa
- urn:nbn:de:bsz:ch1-qucosa2-878080
- Veröffentlichungsdatum Qucosa
- 15.04.2024
- Dokumenttyp
- Dissertation
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis
