Abstract Solar selective absorbers based on semiconducting β-FeSi2 and low-emissive Ag layers were prepared on stainless steel substrates, and the thermal durability below 650 °C was evaluated. Agglomeration and vaporization of the Ag layers were prevented by adding Ta and stacking with TaN layers, respectively. The solar absorbing layers, consisting of β-FeSi2, deteriorated at high temperatures, as a result of diffusion of Si from the silicide layers to substrates, which could be suppressed by using TaN/SiO2 layers at the interface between the stainless steel substrates and Ag layers with Ta and Si additives. The thermally stabilized solar selective absorbers achieved an averaged solar-thermal conversion efficiency of 87.0% between 300 and 650 °C. Arrhenius plots based on accelerated heating tests between 750 and 800 °C showed that the thermally stabilized absorbers were able to keep the decline in efficiency to within 1% for over 42 years at 650 °C.

中文翻译：

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由 β-FeSi2 和不锈钢上的低发射银层组成的太阳能选择性吸收器的热耐久性

摘要 在不锈钢基板上制备了基于半导体 β-FeSi2 和低发射 Ag 层的太阳能选择性吸收器，并评估了其在 650 °C 以下的热耐久性。分别通过添加 Ta 和堆叠 TaN 层来防止 Ag 层的结块和蒸发。由 β-FeSi2 组成的太阳能吸收层在高温下劣化，这是 Si 从硅化物层扩散到基板的结果，这可以通过在不锈钢基板和 Ag 之间的界面处使用 TaN/SiO2 层来抑制含有 Ta 和 Si 添加剂的层。热稳定的太阳能选择性吸收器在 300 至 650 °C 之间实现了 87.0% 的平均太阳能热转换效率。