Fabrication of Intrinsic, Elastic, Self-healing, and Luminescent CsPbBr₃ Quantum Dot-Polymer Composites via Thiol–Ene Cross-Linking

Here, we offer a straightforward approach for making elastic, self-healing, and light-conversion material, in which CsPbBr3 quantum dots (QDs) form a strong bond with a designed copolymer including elastic behavior based on the mechanical characteristics of polyisoprene and reversible bonding moieties for self-healing function. This designed composite film has highly luminescent and typically elastic properties, including good ultimate strength (∼0.14 N/mm2) and high stretchability (∼486%). The copolymer matrix exhibited excellent compatibility with CsPbBr3 QDs, in which they maintained their uniform distribution within the network after a serial stretching process due to the strong bond between copolymers and CsPbBr3 QDs. Furthermore, the composite film dynamic network is capable of 90% self-healing efficiency at room temperature without the need of any healing stimulus, heat, plasticizer, or solvent. This simple method suggested a relatively easy approach to a stable, elastic, and luminescent CsPbBr3 QD-based composite film that opens up the potential of fully stretchable light conversion material for light-emitting diodes