Visible‐Light‐Enhanced Elastomeric Adhesives via Confined Hydrazone Isomerization for Durable Stretchable Hybrid Electronics

ABSTRACT Stretchable hybrid electronics face a critical challenge in achieving reliable interconnections due to the mechanical mismatch between soft circuits and rigid components. To address this, we developed a visible‐light‐enhanced elastomeric adhesive based on a hydrazone photoswitch. Upon 420 nm light irradiation, the hydrazone units undergo a Z → E transition that triggers the in situ conversion of intramolecular to intermolecular hydrogen bonds. Critically, this photoisomerization process remains spatially confined to the adhesion interface, thereby preserving the bulk's inherent high energy dissipation capacity while selectively strengthening the interfacial region. As a result, the adhesive achieves remarkable adhesion enhancement after irradiation. When integrated into stretchable hybrid device, it enables record‐breaking 1500% stretchability and over 10000 cycles (under 100% and 200% strain) of durable operation. This work offers an effective solution for durable hybrid electronics and establishes a new application pathway for hydrazone photoswitches.