In the past few years, the photovoltaic community has witnessed a fast growth of inorganic-organic hybrid perovskite solar cells (PSCs) due to their exceptional power conversion efficiencies with a certified record value exceeding 25%, which rivals the established commercial solar cell technologies. In the state-of-the-art PSCs, a hole-transporting layer (HTL) typically consisting of an active hole-transporting material (HTM) and some additives or dopants, takes the responsibility of transporting the photo-generated holes from the perovskite to the selective contact electrode, and is a key component for achieving high-performance and stable PSCs. In this review article, recent advances in the development of transition metal complexes in HTLs for PSCs including HTMs and p-type dopants are presented.

在过去的几年中，光伏社区见证了无机-有机混合钙钛矿太阳能电池（PSC）的快速增长，这是由于其卓越的功率转换效率（经认证的创纪录价值超过25％）可与已建立的商用​​太阳能电池技术相媲美。在最新的PSC中，通常由活性空穴传输材料（HTM）和一些添加剂或掺杂剂组成的空穴传输层（HTL）负责从钙钛矿中传输光生空穴。选择性接触电极，是实现高性能和稳定的PSC的关键组件。在这篇综述文章中，介绍了用于PSC的HTL中过渡金属配合物的最新进展，包括HTM和p型掺杂剂。