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Title: High performance mid-temperature selective absorber based on titanium oxides cermet deposited by direct current reactive sputtering of a single titanium target

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4940386· OSTI ID:1469184
ORCiD logo [1];  [1];  [2];  [2];  [1]
  1. Univ. of Houston, TX (United States). Dept. of Physics. Texas Center for Superconductivity (TcSUH)
  2. Univ. of Houston, TX (United States). Dept. of Electrical and Computer Engineering

This paper reports the design and fabrication of a new double cermet-based low-mid temperature solar selective absorber based on TiOx cermet layers, which were deposited with a single Ti target by varying O2 partial pressure in sputtering chamber as reactive gas. High metal volume fraction cermet 1 and low metal volume fraction cermet 2 were deposited with O2 partial pressure of 0.15 mTorr and 0.25 mTorr, respectively, with direct current power density of 6.58 W cm-2. The complex refractive indices from ellipsometry were used to design solar selective absorber. The reflectance, thermal stability, and morphology were studied in absorbers on Cu and stainless steel. The effect of TiO2 and SiO2 as anti-reflective coating layers was investigated. Finally, the absorber on Cu substrate has high absorptance of 90.8% and low emittance of 4.9% (100 °C), and changed to 96.0% and 6.6%, respectively, after annealing at 300 °C for 4 days.

Research Organization:
Univ. of Houston, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Robert A. Welch Foundation (United States); National Science Foundation (NSF)
Grant/Contract Number:
SC0001299; E-1728; ECCS-1240510
OSTI ID:
1469184
Alternate ID(s):
OSTI ID: 1235798
Journal Information:
Journal of Applied Physics, Vol. 119, Issue 4; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

References (20)

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Parameterization of the optical functions of amorphous materials in the interband region journal July 1996
Structure and optical properties of Ag–Al2O3 nanocermet solar selective coatings prepared using unbalanced magnetron sputtering journal July 2011
New cermet film structures with much improved selectivity for solar thermal applications journal February 1992
OpenFilters: open-source software for the design, optimization, and synthesis of optical filters journal January 2008
Photovoltaic Technology: The Case for Thin-Film Solar Cells journal July 1999
Process characteristics and film properties upon growth of TiO x films by high power pulsed magnetron sputtering journal March 2007
High solar performance selective surface using bi-sublayer cermet film structures journal August 1992

Cited By (2)

Design and simulation of different multilayer solar selective coatings for solar thermal applications journal April 2018
Semiconductor-based Multilayer Selective Solar Absorber for Unconcentrated Solar Thermal Energy Conversion journal July 2017

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