Fan J C, Bachner F J
Appl Opt. 1976 Apr 1;15(4):1012-7. doi: 10.1364/AO.15.001012.
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: TiO(2)/Ag/TiO(2) and Sn-doped In(2)O(3). To characterize the properties of heat-mirror films for solar-energy collection, we define the parameters alpha(eff), the effective solar absorptivity, and epsilon(eff), the effective ir emissivity. For our Sn-doped In(2)O(3) films, alpha(eff)/epsilon(eff) is comparable to the values of alpha/epsilon reported for the leading selective absorbers. Even higher values of alpha(eff)/epsilon(eff) are obtained for the TiO(2)/Ag/TiO(2) films.
透明热镜薄膜能够透射太阳辐射但反射红外热辐射，在太阳能/热能/电能转换、太阳能加热、太阳能光伏转换及窗户隔热方面有着潜在的重要应用。我们利用射频溅射制备了两种薄膜：TiO(2)/Ag/TiO(2) 和 掺锡氧化铟（Sn-doped In(2)O(3)）。为了表征用于太阳能收集的热镜薄膜的特性，我们定义了参数α(eff)（有效太阳能吸收率）和ε(eff)（有效红外发射率）。对于我们的掺锡氧化铟（Sn-doped In(2)O(3)）薄膜，α(eff)/ε(eff) 与领先的选择性吸收体所报道的α/ε 值相当。对于TiO(2)/Ag/TiO(2) 薄膜，甚至能获得更高的α(eff)/ε(eff) 值。
