Hybrid inorganic-organic perovskites have quickly evolved as a promising group of materials for solar cells and optoelectronic applications mainly owing to the inexpensive materials, relatively simple and versatile fabrication and high power conversion efficiency (PCE). The certified energy conversion efficiency for perovskite solar cell (PSC) has reached above 20%, which is compatible to the current best for commercial applications. However, long-term stabilities of the materials and devices remain to be the biggest challenging issue for realistic implementation of the PSCs. This article discusses the key issues related to the stability of perovskite absorbing layer including crystal structural stability, chemical stability under moisture, oxygen, illumination and interface reaction, effects of electron-transporting materials (ETM), hole-transporting materials (HTM), contact electrodes, ion migration and preparation conditions. Towards the end, prospective strategies for improving the stability of PSCs are also briefly discussed and summarized. We focus on recent understanding of the stability of materials and devices and our perspectives about the strategies for the stability improvement.

中文翻译：

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稳定用于太阳能电池的混合钙钛矿的最新进展

杂化无机-有机钙钛矿已经迅速发展成为太阳能电池和光电应用的有前途的材料组，这主要是由于廉价的材料，相对简单和通用的制造方法以及高功率转换效率（PCE）。钙钛矿型太阳能电池（PSC）的认证能量转换效率已达到20％以上，与目前最适合商业应用的性能兼容。然而，材料和设备的长期稳定性仍然是实际实施PSC所面临的最大挑战。本文讨论了与钙钛矿吸收层稳定性有关的关键问题，包括晶体结构稳定性，在湿气，氧气，光照和界面反应下的化学稳定性，电子传输材料（ETM）的影响，空穴传输材料（HTM），接触电极，离子迁移和制备条件。最后，还简要讨论并总结了改善PSC稳定性的预期策略。我们将重点放在对材料和设备的稳定性的最新理解以及对稳定性改进策略的看法上。