Possible high absorptance and low emittance selective surface for high temperature solar thermal collectors

Journal Article · Wed May 01 00:00:00 EDT 1991 · Applied Optics; (United States)

DOI:https://doi.org/10.1364/AO.30.001653· OSTI ID:5506886

Zhang, Q; Kelly, J ^[1]; Mills, D ^[2]

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1. University of New South Wales, School of Physics, Kensington, NSW 2033, Australia (AU)
2. University of Sydney, School of Physics, Sydney, NSW, Australia (AU)

Optical reflectivity measurements show that the reflectivity of Ge is dramatically reduced in the wavelength 0.3--1.4-{mu}m range after high dose oxygen ion implantation. To explain such greatly reduced reflectivity, a model has been developed for the reflectivity of high dose oxygen implanted germanium. Our experimentally measured and calculated reflectivities show that, for a layered structure consisting of a Ge and GeO{sub 2} mixture on Ge on GeO{sub 2} on a Cu substrate, a low reflectivity of 0--10% in the solar spectrum is obtained, together with a high reflectivity {similar to}100% in the 1.7--25-{mu}m wavelength range. This is close to that of an ideal selective surface for solar energy thermal collectors operating at high temperatures from 300 to 500{degree}C.

• OSTI ID: 5506886
• Journal Information: Applied Optics; (United States), Vol. 30:13; ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
36 MATERIALS SCIENCE
GERMANIUM
ION IMPLANTATION
SOLAR COLLECTORS
REFLECTIVITY
HIGH TEMPERATURE
OXYGEN
SURFACES
ELEMENTS
EQUIPMENT
METALS
NONMETALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
SOLAR EQUIPMENT
SURFACE PROPERTIES
140501* - Solar Energy Conversion- Photovoltaic Conversion
360603 - Materials- Properties