Herein, we report an integrated photoelectrolysis of water employing organic metal halide (OMH) perovskite material. As generic OMH perovskite material and device architecture are highly susceptible to degradation by aqueous electrolytes, we have developed a versatile mold-cast and lift-off process to fabricate and assemble multipurpose metal encapsulation onto perovskite devices. With the metal encapsulation effectively protecting the perovskite cell and also functioning as electrocatalyst, the high-performance perovskite photoelectrodes exhibit high photovoltage and photocurrent that are effectively inherited from the original solid-state solar cell. More importantly, thus-fabricated perovskite photoelectrode demonstrates record-long unprecedented stability even at highly oxidizing potential in strong alkaline electrolyte. We expect that this versatile lift-off process can be adapted in a wide variety of photoelectrochemical devices to protect the material surfaces from corroding electrolyte and facilitate various electrochemical reactions.
In state-of-the-art n-i-p structured perovskite solar cells (PSCs), a dopant for doping hole transporting materials (HTMs) is a crucial component, which not only affects the electrical property of HTMs, but...
Herein we report on the selective synthesis and direct growth of nanostructures using an aqueous chemical growth route. Specifically, Al-doped ZnO (AZO) nanoflakes (NFs) are vertically grown on indium tin oxide (ITO) coated flexible polyethylene terephthalate (PET) sheets at low temperature and ambient environment. The morphological, optical, and electrical properties of the NFs are investigated as a function of the Al content. Furthermore, these AZO-NFs are integrated into perovskite solar devices as the electron transport layer (ETL) and the fabricated devices are tested for photovoltaic performance. It was determined that the doping of AZO-NFs significantly increases the performance metrics of the solar cells, mainly by increasing the short-circuit current of the devices. The observed enhancement is primarily attributed to the improved conductivity of the doped AZO-NF, which facilitates charge separation and reduces recombination. Further, our flexible solar cells fabricated through this low temperature process demonstrate an acceptable reproducibility and stability when exposed to a mechanical bending test.
The express Improvement of perovskite solar cells(PSC) has made them the highest Interest to studied for PV(Photovoltaics) and application in renewable energy. Here in we report on PSC applied on photoelectrolysis of water. Basically, it is easily decomposed by moisture and water. Thus, when it applied to water splitting. It is Important to protect device for stability of PSC. In this work, we demonstrate a method that improved stability of PSC during oxygen evolution in water. Field’s metal, a fusible In-Bi-Sn alloy, is used efficiently as a protection. Because of this it prevents the electrolyte from attacking the perovskite layer, and at the same time stably operates the reaction that the generated electrons transfer to oxygen evolution reaction(OER). Also it is deposited the Ni layer on the device by electrodeposition method. Ni as a catalyst for OER and it is abundant. As a result, the photo-electrode shows remarkable stability and performance in neutral and alkaline solutions, Under the continuous illumination(AM1.5G).
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