Possible high absorptance and low emittance selective surface for high temperature solar thermal collectors.
Appl Opt
; 30(13): 1653-8, 1991 May 01.
Article
en En
| MEDLINE
| ID: mdl-20700339
ABSTRACT
Optical reflectivity measurements show that the reflectivity of Ge is dramatically reduced in the wavelength 0.3-1.4-microm 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(2) mixture on Ge on GeO(2) on a Cu substrate, a low reflectivity of 0-10% in the solar spectrum is obtained, together with a high reflectivity approximately 100% in the 1.7-25-microm 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 degrees C.
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01-internacional
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MEDLINE
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En
Revista:
Appl Opt
Año:
1991
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Article