Perovskite solar cells have revolutionized the field of photovoltaics. Apart from their impressive photo-conversion efficiencies, the ease of their fabrication – principally when carried out by solution processing – has permitted addition of new functionalities to the photovoltaic cell. Some of these features are related to the optical properties. In this review, the different materials chemistry approaches that allow controlling the spectral absorption of ABX₃ perovskite layers and the changes that they produce in the visual aspect of the solar cell will be covered. These modifications can be done either by playing with the composition of the precursors or by integrating different types of nanostructures. Spectral bandgap tuning, semitransparency, color and enhancement of light absorption are examples of how these modifications operate in the core of ABX₃ perovskite solar cells. These optical features bring benefits in terms of photo-conversion efficiencies or else in the aesthetical integration of perovskite solar cells with architectonic elements for building integrated photovoltaics. Additionally, surface passivation approaches are covered to show its effect over the photo-conversion efficiency and stability of the cell.

中文翻译：

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材料化学方法控制钙钛矿太阳能电池的光学特性

钙钛矿太阳能电池彻底改变了光伏领域。除了其令人印象深刻的光转换效率外，它们的易于制造（主要是通过溶液处理来实现）还使光伏电池具有了新的功能。这些特征中的一些与光学性质有关。在这篇综述中，不同的材料化学方法可以控制ABX ₃的光谱吸收钙钛矿层及其在太阳能电池视觉方面产生的变化将被覆盖。这些修饰可以通过利用前体的组成或通过整合不同类型的纳米结构来完成。光谱带隙调整，半透明性，颜色和光吸收增强是这些修饰如何在ABX ₃钙钛矿太阳能电池的核心中起作用的示例。这些光学特征在光转换效率方面或者在钙钛矿太阳能电池与用于构建集成光伏的建筑元件的美学整合方面带来益处。另外，覆盖了表面钝化方法以显示其对电池的光转换效率和稳定性的影响。