In recent years, halide perovskite solar cells (HPSCs) have attracted a great attention due to their superior photoelectric performance and the low‐cost of processing their quality films. In order to commercialize HPSCs, the researchers are focusing on developing high‐performance HPSCs. Many strategies have been reported to increase the power conversion efficiency and the long‐term stability of HPSCs over the past decade. Herein, we review the latest efforts and the chemical‐physical principles for preparing high‐efficiency and long‐term stability HPSCs in particular, concentrating on the perovskite materials, technologies for perovskite films, charge transport materials and ferroelectric effect to reduce the carrier loss, and photon management via plasmonic and upconversion effects. Finally, the key issues for future researches of HPSCs are also discussed with regard to the requirements in practical application.

Perovskite solar cells (PSCs) have shown great application potential due to their excellent performance and simple manufacturing processes. However, the defects in the interior and surface of perovskite film are...

The great potential of perovskite solar cells (PSCs) remains to be further exploited via the improvement of their incomplete photon absorption and the reduction of abundant defects in perovskite. Here, we added Au clusters with 3-methylbenzenethiol (m-MBT) as ligands in perovskite to investigate the effect of surface plasmons on the light absorption of the perovskite layer and the passivation of m-MBT on the defects for perovskite. The results show that the addition of Au clusters not only effectively enhances the light absorption ability of perovskite but also effectively passivates the defects and suppresses the charge recombination. Meanwhile, we discuss the effect of doped Au clusters on the performance of PSCs. The power conversion efficiency of Au cluster-optimized PSCs was greatly improved to 20.6% from 18.8% for the control PSCs. In addition, due to the reduction of defects in perovskite, the stability of the improved PSCs is also greatly improved.

There are a large number of defects on the surface and grain boundaries of the perovskite layer, which is an important reason for the further development of perovskite solar cells...