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Germanium selective solar absorber surfaces

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Abstract

Thin Ge films, produced by evaporation through 0.3, 1 and 3 torr pressures of argon onto polished aluminum substrates were found to exhibit selective absorption behaviour. Maximum absorptance to emittance ratios of 13∶1 were measured, with values of 8∶1 for films having solar absorptances of 0,9. Film structures were significant in determining collection efficiency. Films deposited at 0.3 torr showed better overall properties due to a larger particle size of about 1 μm compared with an approximate 0.1 μm size measured with films deposited at 1 and 3 torr.

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Authors and Affiliations

  1. Department of Mechanical Engineering and Materials Science, Duke University, 27706, Durham, N.C., USA

    Paul P. Thogersen, Franklin H. Cocks, John T. A. Pollock & Phillip L. Jones

Authors
  1. Paul P. Thogersen
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  2. Franklin H. Cocks
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  3. John T. A. Pollock
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  4. Phillip L. Jones
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Additional information

On leave from Australian Atomic Energy Commission, Sydney, Australia.

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Thogersen, P.P., Cocks, F.H., Pollock, J.T.A. et al. Germanium selective solar absorber surfaces. J Mater Sci 17, 1377–1380 (1982). https://doi.org/10.1007/BF00752249

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  • DOI: https://doi.org/10.1007/BF00752249

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