Complementary Molecular Passivation of Multiple Surface Defects for Efficient and Stable Inverted Perovskite Solar Cells.

A complementary passivation strategy employing the simultaneous use of phenylethylammonium iodide (PEAI) and ethylhydrazinoacetate hydrochloride (EHACl) is developed to mitigate multiple surface defects in perovskite films. PEAI mainly aims at vacancy defects and tends to induce quasi-2D/3D interface reconstruction, while rich Lewis base sites within EHACl enable it to selectively passivate Lewis acid defects such as undercoordinated Pb⁺. Advanced nonadiabatic molecular dynamics simulations based on large supercell slabs of FAPbI surface directly correlate the surface chemical interactions with nonradiative carrier lifetimes.

Regulating Strain and Suppressing Defect States Through Polymer Ionization and Chemical Chelation for Efficient Inverted Flexible Perovskite Solar Cells.

Flexible perovskite solar cells (FPSCs) have great promise for applications in wearable technology and space photovoltaics. However, the unpredictable crystallization of perovskite on flexible substrates results in significantly lower efficiency and mechanical durability than industry standards. A strategy is investigated employing the polymer electrolyte poly(allylamine hydrochloride) (PAH) to regulate crystallization and passivate defect states in perovskite films on flexible substrates.

Simultaneous Electrochemical Exfoliation and Functionalization of 2H-MoS for Supercapacitor Electrodes.

MoS is a promising semiconducting material that has been widely studied for applications in catalysis and energy storage. The covalent chemical functionalization of MoS can be used to tune the optoelectronic and chemical properties of MoS for different applications. However, 2H-MoS is typically chemically inert and difficult to functionalize directly and thus requires pretreatments such as a phase transition to 1T-MoS or argon plasma bombardment to introduce reactive defects.

Multi-metal electrocatalyst with crystalline/amorphous structure for enhanced alkaline water/seawater hydrogen evolution.

The development of well-defined nanomaterials as non-noble metal electrocatalysts has broad application prospect for hydrogen generation technology. Recently, multi-metal electrocatalysts for hydrogen evolution reaction (HER) have attracted extensive attention due to their high catalytic performance arising from the synergistic effect of multi-metal interaction. However, most multi-metal catalysts suffer from the limited synergistic effect because of poor interfacial compatibility between different components.

Electrocatalysis Mechanism and Structure-Activity Relationship of Atomically Dispersed Metal-Nitrogen-Carbon Catalysts for Electrocatalytic Reactions.

Atomically dispersed metal-nitrogen-carbon catalysts (M-N-C) have been widely used in the field of energy conversion, which has already attracted a huge amount of attention. Due to their unsaturated d-band electronic structure of the center atoms, M-N-C catalysts can be applied in different electrocatalytic reactions by adjusting their own microscopic electronic structures to achieve the optimization of the structure-activity relationship. Consequently, it is of great significance for the revelation of electrocatalytic mechanism and structure-activity relationship of M-N-C catalysts.