Exceptionally high efficiencies for organic–inorganic hybrid perovskite solar cells (PSCs) have been achieved. However, their operational stability still needs to be improved. The intrinsic instability of halide perovskites caused by the presence of volatile organic cations, as well as the degradation of hybrid perovskites induced by the adverse permeation of environmental water (H₂O)/oxygen (O₂) and the undesired ion diffusion or migration are the major reasons. Beyond strengthening perovskites themselves, interface engineering is now regarded as a valid strategy to prolong device lifetime by preventing the undesired degradation pathways. This comprehensive review highlights the utilization of practical interface engineering for enhancing the efficiency and stability of organic–inorganic lead halide PSCs. First, the impacts of interface design on the energy‐level alignment and carrier dynamics are overviewed. Second, recent progresses on the development of interfacial materials for simultaneously achieving high efficiency and stability of PSCs are summarized. At last, the interfacial layer design principles along with future outlook of this rapidly developing field are discussed.

中文翻译：

---

钙钛矿太阳能电池实用界面工程综述：从效率到稳定性

有机-无机混合钙钛矿太阳能电池（PSC）的效率异常高。但是，它们的操作稳定性仍然需要提高。挥发性有机阳离子的存在导致卤化物钙钛矿的固有不稳定性，以及由于环境水（H ₂ O）/氧气（O ₂）的不利渗透而引起的杂化钙钛矿的降解）和不希望的离子扩散或迁移是主要原因。除了增强钙钛矿本身之外，接口工程现在还被认为是通过防止有害的降解途径来延长设备寿命的有效策略。这份全面的综述着重介绍了利用实用的界面工程技术来提高有机-无机卤化铅PSC的效率和稳定性。首先，概述了界面设计对能级对准和载流子动力学的影响。其次，总结了在同时实现PSC的高效率和稳定性的界面材料开发方面的最新进展。最后，讨论了界面层设计原理以及该快速发展领域的未来前景。