Metal-halide perovskite solar cells (PSCs) have become a promising candidate for photovoltaic applications. Current popular organic hole conductors for highly efficient PSCs bring cost and stability issues, which hinder the commercialization of the PSCs. Hole-conductor-free PSCs are attracting great interest because they eliminate the adverse effects of organic hole conductors by transporting holes in the perovskite itself. In this article, we summarize recent progress in conventional, inverted, and printable mesoscopic hole-conductor-free PSCs. Specifically, we emphasize the stunning stability and scale-up manufacturing of printable hole-conductor-free PSCs, discussing their potential from laboratory to market. The causes for hole-conductor-free PSCs’ current low efficiency are also discussed, and are primarily ascribed to energy-level alignment and interface recombination. We believe that the efficiencies of hole-conductor-free PSCs can be enhanced to be comparable with hole-conductor-containing PSCs by interface modification and material design.

金属卤化物钙钛矿太阳能电池（PSC）已成为光伏应用的有前途的候选者。当前流行的用于高效PSC的有机空穴导体带来了成本和稳定性问题，这阻碍了PSC的商业化。无空穴导体的PSC引起了极大的兴趣，因为它们通过在钙钛矿本身中运输空穴来消除有机空穴导体的不利影响。在本文中，我们总结了常规的，倒置的和可印刷的无介观孔导体的PSC的最新进展。特别是，我们强调了无孔导体可印刷PSC的惊人稳定性和按比例放大的制造，并讨论了从实验室到市场的潜力。还讨论了无孔导体PSC电流效率低的原因，并且主要归因于能级对准和界面重组。我们相信，通过界面修改和材料设计，可以将无孔导体的PSC的效率提高到与含孔导体的PSC相当。