The commercialization of perovskite solar cells (PSCs) is expected. However, the selection of fabrication technology remains unclear, especially with different technologies corresponding to different area ranges. This study presents a summary of recent technologies related to device area and photovoltaic parameters for certain area ranges. Blade-coating, slot-die coating, and bar-coating technologies are suitable for PSCs whose area is greater than or equal to 100 cm². Meanwhile, meniscus-coating, spray-coating, and roll-to-roll technologies are appropriate for flexible large-area PSCs. The definition of large area has been updated to one above 10 cm². In conclusion, we provide a perspective for future large-area perovskite photovoltaics.

In recent years, all-inorganic perovskite materials have set off a research boom owing to features, such as good thermal stability, suitable bandgap, and fascinating optical properties. However, the power conversion efficiency (PCE) and the ambient stability of all-inorganic perovskite solar cells still remain a challenge. Herein, we investigate the effect of the addition of InI₃ into CsPbI₃ film on the corresponding device. InI₃ incorporation could retard the crystallization process and control the growth rate of CsPbI₃ polycrystalline films, yielding a high quality film with large grains and few voids. The increment in electrostatic potential and the reduction of carrier recombination enabled the open-circuit voltage of fabricated perovskite solar cell to be increased from 0.89 to 0.99 V. The champion device delivered a power conversion efficiency of 17.09%, which is higher than 14.36% for the reference device. And the InI₃-included solar cell without any encapsulation retained 77% of its original efficiency after 860 h aging at room temperature in N₂ condition.

With the increasingly prominent energy and environmental issues, the supercapacitors, as a highly efficient and clean energy conversion and storage devices, meet the requirements well. However, it is still a challenge to enhance the capacitance and energy density of supercapacitors. A novel and highly conductive dodecaborate/MXene composites have been designed for high performance supercapacitors. The surface charge property of MXene was modified by a simple ultrasonic treatment with ammonium ion, and the dodecaborate ion can be inserted into the inner surface of MXene by electrostatic adsorption. Due to the unique icosahedral cage conjugate structure formed by the B-B bond and the highly delocalized three-dimensional π bond structure of the electrons, the negative charge is delocalied on the whole dodecaborate ion, which reduces the ability to bind to cations. Therefore, the cations can move easily, and the dodecaborate can act as a "lubricant" for ion diffusion between the MXene layers, which significantly improves the ion transfer rate of supercapacitors. The dodecaborate/MXene composites can achieve an extremely high specific capacitance of 366 F·g^-1 at a scan rate of 2 mV·s^-1, which is more than eight times higher than that of MXene (43 F·s^-1) at the same scan rate. Our finding provides a novel route on the fabrication of the high performance supercapacitors.