Perovskite solar cells (PSCs) are promising photovoltaic technologies due to their impressive power conversion efficiency (PCE) and low‐temperature fabrication process, while it is still challenging to print uniform perovskite film with high crystalline quality over a module size. Here, a printable and stable perovskite nanocapsules ink to realize the high‐throughput printing of large‐area, highly uniform perovskite films with micron grain size is reported. It is discovered that the releasing effect of these perovskite nanocapsules promotes homogeneous nucleation by diffusion‐controlled growth due to the steady‐state diffusion of the solute in solution. Remarkably, the printed PSCs and 25 cm2 modules achieve power conversion efficiencies of 22.10% and 16.12%, respectively. They exhibit negligible efficiency loss after continuous operation for over 1000 h under AM1.5 illumination, and excellent thermal (85 °C) stability with over 87% of the initial efficiency after aging for 500 h. This perovskite nanocapsules ink is expected to facilitate the high‐yield fabrication of perovskite photovoltaics.
Aqueous rechargeable magnesium ion batteries are a dramatic safe, low-cost, and green energy storage system but are trapped in low-capacity cathode and enormously limited anode materials. Therefore, based on previous research foundations, the Mg-OMS-1/graphene composite as a cathode is obtained by combining the todorokite-type Mg-OMS-1 with nanowire morphology and flaky graphene, exhibiting higher electrochemical properties. The discharged capacities of single and composite electrodes in the Mg-(NO 3 ) 2 electrolyte are 150.4 and 194.1 mAh g −1 at a current density of 20 mA g −1 , respectively. Additionally, the self-made carbon molecular sieve (CMS) material is explored as an anode material in this aqueous energy storage system, displaying a discharged capacity of 64.8 mAh g −1 at 100 mA g −1 . Furthermore, an aqueous rechargeable magnesium ion battery capacitor device is assembled using composite electrode material as a cathode and CMS material as an anode. This system displays an excellent cycling lifespan with 98.6% capacity retained after 800 cycles at a current density of 100 mA g −1 .
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