Germanium selective solar absorber surfaces

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. © 1982 Chapman and Hall Ltd.

Duke Scholars

Author F. Hadley Cocks Thomas Lord Department of Mechanical Engineering and Materia ...