In this study, solid solutions formed of SnO and CaO [termed (Sn:Ca)xO] are explored as potential solar active layers. The results indicate that a ratio of x = 7 : 1 leads to a fundamental direct bandgap of 1.56 eV. In order to promote the transport of excited charge carriers from within the active layer, appropriately aligned hole/electron transport layers need to be identified. To this end, a set of results are presented for the electronic band alignment of (Sn:Ca)7:1O with a selection of oxide transport layers, with and without oxygen vacancies. From this, it is recommended that a CaO/(Sn:Ca)7:1O/TiO2 device shows the most potential for an all-oxide solar cell.

中文翻译：

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用于太阳能设备的氧化钙亚锡固溶体

在这项研究中，探索了由 SnO 和 CaO [称为 (Sn:Ca)xO] 形成的固溶体作为潜在的太阳能活性层。结果表明 x = 7:1 的比率导致 1.56 eV 的基本直接带隙。为了促进从有源层内部传输受激电荷载流子，需要确定适当排列的空穴/电子传输层。为此，提供了一组结果，用于 (Sn:Ca)7:1O 的电子能带排列与选择的氧化物传输层，有和没有氧空位。因此，建议 CaO/(Sn:Ca)7:1O/TiO2 器件显示出全氧化物太阳能电池的最大潜力。