Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 107, Issue -, Pages 219-224Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2012.06.031
Keywords
High temperature solar selective coating; Superhydrophobicity; Sputtering; Broadband anti-reflection
Funding
- Council of Scientific and Industrial Research (CSIR), New Delhi [FAC-00-01-11]
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We report the fabrication of a nanometric multi-scale rough, transparent and anti-reflective zinc oxide (ZnO) superhydrophobic coating on TiAlN/TiAlON/Si3N4 spectrally selective solar absorber surface, which has been developed previously for solar thermal power generation applications. The optimized ZnO superhydrophobic coating on the absorber surface demonstrates extraordinary water repellency (with contact angle > 155 degrees), improved absorptance (> 0.96) and excellent broadband anti-reflection in the visible range of the solar spectrum. The multi-functional ZnO coating was stable up to 450 degrees C (in air and vacuum), indicating its reliability for high temperature photothermal conversion applications. (C) 2012 Elsevier B.V. All rights reserved.
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