Perovskite solar cells (PSCs) based on organic–inorganic hybrid materials are a rising technology offering an alternative to silicon‐based solar cells. Electron‐transport materials (ETMs) are important for PSCs and have received much attention. Here, first, the development of the structure of PSCs, from which the ETM requirements would be derived, is briefly discussed. Second, the progress of ETMs in mesoscopic PSCs, as well as regular (n–i–p) and inverted (p–i–n) planar PSCs is surveyed and analyzed, in terms of the material requirements, inorganic ETMs, organic ETMs, and interfacial materials. Third, the advancement of PSCs without ETMs is discussed. Finally, a summary and outlook on the current challenges and future development of ETMs in PSCs is given.

中文翻译：

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钙钛矿太阳能电池中的电子传输材料

基于有机-无机混合材料的钙钛矿太阳能电池（PSC）是一项新兴技术，可替代硅基太阳能电池。电子传输材料（ETM）对于PSC非常重要，并已引起广泛关注。在这里，首先，简要讨论PSC结构的发展，从中可以得出ETM要求。其次，从材料要求，无机ETM，有机ETM角度，对介观PSC以及常规（n–i–p）和倒置（p–i–n）平面PSC中ETM的进展进行了调查和分析，和界面材料。第三，讨论了没有ETM的PSC的发展。最后，对PSC中ETM的当前挑战和未来发展进行了总结和展望。