Embedding SnO₂ Thin Shell Protected Ag Nanowires in SnO₂ ETL to Enhance the Performance of Perovskite Solar Cells

Abstract

The energy level mismatching between SnO2 and perovskite and the nonradiative recombination at SnO2-perovskite interface severely degrade the extraction of carriers, reducing the power conversion efficiency (PCE) and stability of planar perovskite solar cells (PSCs) based on SnO2 electron transfer layer (ETL). In the present work, a reinforced SnO2 ETL was successfully developed by embedding SnO2 thin shell protected Ag nanowires (Ag/SnO2 NWs) in traditional planar SnO2 film, which was proved to not only lower the conduction band of SnO2 to adjust the energy level matching, but also significantly reduce the interfacial carrier recombination. Moreover, Ag/SnO2 NWs improved the electrical conductivity of SnO2 ETL, and effectively promoted carrier transport. Benefiting from the use of Ag/SnO2 NWs, our newly designed PSC achieved a significantly increased champion PCE of 19.78%, which is 7% higher than the traditional PSC without Ag/SnO2 NWs embedding, indicating its great application potential in PSCs.

Pd-Nanoparticles Embedded Metal–Organic Framework-Derived Hierarchical Porous Carbon Nanosheets as Efficient Electrocatalysts for Carbon Monoxide Oxidation in Different Electrolytes

“…The continuous utilization of non-renewable fossil fuels leads to the inevitable emission of hazardous gases, leading to global warming and climate changes . Various efforts were dedicated to circumventing these issues, including finding alternate renewable energy sources, like water electrolysis, − solar cells, − alcohol oxidation, − and oxygen reduction-based fuel cells. , Another practical approach is the conversion of harmful gases (i.e., CO , and CO 2 ) to suitable chemicals and fuels. CO oxidation is essential in industrial, environmental, and fundamental applications. − Also, CO poisoning is one of the most significant barriers that deteriorate the performance of alcoholic-based fuel cells. − Electrochemical CO oxidation is among the most promising ways to remove CO from the atmosphere or convert it to valuable products or less hazardous gases and is preferred to thermal oxidation due to a lower energy demand .…”

Hydrothermal Deposition of UV‐Absorbing Passivation Layers for Efficient and Stable Perovskite Solar Cells

“…[ 33 ] As a result, Figure 4f provides the energy band alignment diagram for the PSC devices. The deeper E CB in the reinforced SnO 2 film is a better match for the energy level of the PVK layer than the E CB in the pure SnO 2 film, which could make the driving force for electron injection from the PVK layer into the SnO 2 ETL stronger, making it easier to get photogenerated carriers out of the PVK layer and move them to the SnO 2 ETL, [ 34 ] where E VBM and E CBM , respectively, stand for the energy of the valence band maximum and the energy minima of the conduction band. Figure 4a,b shows the UV–vis absorption spectra of SnO 2 and SnO 2 –CeO 2 before and after deposition of the PVK layer.…”

A thiourea resin polymer as a multifunctional modifier of the buried interface for efficient perovskite solar cells with reduced lead leakage

“…The declined PL intensity indicates that the TSU modification is facile to the electron extraction and transport at the SnO 2 /perovskite interface. 29…”