Olefin Ligand Metathesis for Colloidal Emissive Nanocrystals with Enhanced Stability and Photosensitivity.

High-resolution patterning of colloidal perovskite nanocrystals (PNCs) is essential for next-generation display technologies, yet conventional approaches relying on exogenous photosensitive ligands or additives often compromise optical properties and colloidal stability. Here, we present a nondestructive ligand modification strategy based on olefin metathesis, in which original oleic acid and oleylamine ligands are converted into metathesized ligands featuring dual anchoring groups and shortened chains. This structural transformation enhances colloidal stability through stronger chelation and reduced conformational entropy of possible ligand configurations.

Dual-Strategy Direct Photocatalytic Patterning for Efficient Perovskite Nanocrystal LED Displays.

Achieving nondestructive, high-resolution patterning of perovskite nanocrystals (PeNCs) is essential for next-generation near-eye displays. However, the intrinsic instability of PeNCs renders conventional patterning methods detrimental to their optical and electrical properties. Herein, a dual strategy is reported that enables both high-resolution patterning and the fabrication of efficient light-emitting diodes (LEDs).