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Polycrystalline perovskite films fabricated on flexible and textured substrates often are highly defective, leading to poor performance of perovskite devices. Finding substrate‐tolerant perovskite fabrication strategies is therefore paramount. Herein, this study shows that adding a small amount of Cadmium Acetate (CdAc2) in the PbI2 precursor solution results in nano‐hole array films and improves...
Surface defects‐mediated nonradiative recombination plays a critical role in the performance and stability of perovskite solar cells (PSCs) and surface post‐treatment is widely used for efficient PSCs. However, the commonly used surface passivation strategies are one‐off and the passivation defect ability is limited, which can only solve part of the defects in the topmost surface area. Here, a secondary...
Nickel oxide (NiOx) is an attractive hole‐transport material for efficient and stable p–i–n metal‐halide perovskite solar cells (PSCs). However, an undesirable redox reaction occurs at the NiOx/perovskite interface, which results in a low open‐circuit voltage (VOC), instability, and phase separation of the NiOx‐based wide‐bandgap perovskite (Br > 20%). In order to simultaneously address the abovementioned...
Perovskite solar cells (PSCs) have attracted unprecedented attention due to their rapidly rising photoelectric conversion efficiency (PCE). In order to further improve the PCE of PSCs, new possible optimization path needs to be found. Here, quasi‐heteroface PSCs (QHF‐PSCs) is designed by a double‐layer perovskite film. Such brand new PSCs have good carrier separation capabilities, effectively suppress...
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