Abstract
Transparent heat-mirror films, which transmit solar radiation but reflect ir thermal radiation, have potentially important applications in solar/thermal/electric conversion, solar heating, solar photovoltaic conversion, and window insulation. We have used rf sputtering to prepare two types of films: TiO2/Ag/TiO2 and Sn-doped In2O3. To characterize the properties of heat-mirror films for solar-energy collection, we define the parameters αeff, the effective solar absorptivity, and ∊eff, the effective ir emissivity. For our Sn-doped In2O3 films, αeff/∊eff is comparable to the values of α/∊ reported for the leading selective absorbers. Even higher values of αeff/∊eff are obtained for the TiO2/Ag/TiO2 films.
© 1976 Optical Society of America
Full Article | PDF ArticleMore Like This
Sadafumi Yoshida
Appl. Opt. 17(1) 145-150 (1978)
J. A. Pracchia and J. M. Simon
Appl. Opt. 20(2) 251-258 (1981)
Kevin H. Betts, Robert R. Parsons, and Michael J. Brett
Appl. Opt. 24(16) 2651-2654 (1985)