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The Role of Charge Selective Contacts in Perovskite Solar Cell Stability

机译：电荷选择性接触在钙钛矿太阳能电池稳定性中的作用

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Lead halide perovskite solar cells have rapidly achieved high efficiencies comparable to established commercial photovoltaic technologies. The main focus of the field is now shifting toward improving the device lifetime. Many efforts have been made to increase the stability of the perovskite compound and charge-selective contacts. The electron and hole selective contacts are responsible for the transport of photogenerated charges out of the solar cell and are in intimate contact with the perovskite absorber. Besides the intrinsic stability of the selective contacts themselves, the interfaces at perovskite/selective contact and metal/selective contact play an important role in determining the overall operational lifetime of perovskite solar cells. This review discusses the impact of external factors, i.e., heat, UV-light, oxygen, and moisture, and measured conditions, i.e., applied bias on the overall stability of perovskite solar cells (PSCs). The authors summarize and analyze the reported strategies, i.e., material engineering of selective contacts and interface engineering via the introduction of interlayers in the aim of enhancing the device stability of PSCs at elevated temperatures, high humidity, and UV irradiation. Finally, an outlook is provided with an emphasis on inorganic contacts that is believed to be the key to achieving highly stable PSCs.
机译：与已确立的商业光伏技术相比，卤化钙钛矿型铅酸太阳能电池已迅速实现了高效率。现在，该领域的主要重点正在转向提高设备寿命。为了增加钙钛矿化合物和电荷选择接触的稳定性，已经进行了许多努力。电子和空穴选择性接触负责将光生电荷从太阳能电池中运出，并与钙钛矿吸收剂紧密接触。除了选择性接触件本身的固有稳定性之外，钙钛矿/选择性接触件和金属/选择性接触件的界面在确定钙钛矿太阳能电池的整体使用寿命中起着重要作用。这篇评论讨论了外部因素（即热量，紫外线，氧气和水分）的影响以及测量条件（即对钙钛矿太阳能电池（PSC）的整体稳定性施加的偏压）的影响。作者总结并分析了已报道的策略，即通过引入中间层来实现选择性接触的材料工程和界面工程，目的是增强PSC在高温，高湿和紫外线照射下的器件稳定性。最后，展望将重点放在无机接触上，这被认为是实现高度稳定的PSC的关键。

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