Supramolecular Modulation for Selective Mechanochemical Iron-Catalyzed Olefin Oxidation.

The development of a mechanochemical Fe-catalyzed Wacker oxidation of olefins with a sustainable and benign procedure holds significant promise for industrial applications. However, navigating the intricate interactions inherent in ball-milling conditions to fine-tune reaction selectivity remains a formidable challenge. Herein, leveraging the dispersive and/or trapping properties of cyclodextrins, an innovative mechanochemical approach is developed through the integration of cyclodextrins into a Fe-catalyzed system, enabling a streamlined Wacker oxidation process from simple and/or commercially available alkenes.

Kinetic Control of Solvate Intermediate Evolution for High-Performance Perovskite Solar Cells by the Facial Mask Incubation Technique.

The growth of high-quality perovskite films is complicated by the fact of uncontrollable crystallization pathways from perovskite precursors. During solution processing, extensive undesired nonperovskite products including residual solvate intermediates are produced due to quick solvent evaporation, which will adversely affect the efficiency and stability of perovskite solar cells (PSCs). Herein, we developed a highly efficient phase-transition pathway using a polydimethylsiloxane (PDMS)-based facial mask (FM) incubation technique, which enables significant reduction of the perovskite crystallization rate and depression of perovskite aggregation behavior.

Simultaneous Bulk and Surface Defect Passivation for Efficient Inverted Perovskite Solar Cells.

Structural defects in the bulk and on the surface of the perovskite layer serving as trap sites induce nonradiative recombination losses, limiting the performance improvement of perovskite solar cells (PSCs). Herein, we report a trometamol-induced dual passivation (TIDP) strategy to fix both bulk and surface defects of perovskites, where the trometamol molecule can simultaneously act as chemical additive and surface-modification agent. Studies show that trometamol as an additive can effectively reduce ionic defects and enhance the grain size of perovskites through Pb/-NH coordination bonds and I/-OH hydrogen bonds.